diff --git a/Cargo.lock b/Cargo.lock
index 5340c8fcd7..7e9c750137 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4141,7 +4141,16 @@ version = "0.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8d67778784b508018359cbc8696edb3db78160bab2c2a28ba7f56ef6932997f8"
 dependencies = [
- "derive_builder_macro",
+ "derive_builder_macro 0.12.0",
+]
+
+[[package]]
+name = "derive_builder"
+version = "0.20.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0350b5cb0331628a5916d6c5c0b72e97393b8b6b03b47a9284f4e7f5a405ffd7"
+dependencies = [
+ "derive_builder_macro 0.20.0",
 ]
 
 [[package]]
@@ -4156,16 +4165,38 @@ dependencies = [
  "syn 1.0.109",
 ]
 
+[[package]]
+name = "derive_builder_core"
+version = "0.20.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d48cda787f839151732d396ac69e3473923d54312c070ee21e9effcaa8ca0b1d"
+dependencies = [
+ "darling 0.20.10",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.71",
+]
+
 [[package]]
 name = "derive_builder_macro"
 version = "0.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ebcda35c7a396850a55ffeac740804b40ffec779b98fffbb1738f4033f0ee79e"
 dependencies = [
- "derive_builder_core",
+ "derive_builder_core 0.12.0",
  "syn 1.0.109",
 ]
 
+[[package]]
+name = "derive_builder_macro"
+version = "0.20.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "206868b8242f27cecce124c19fd88157fbd0dd334df2587f36417bafbc85097b"
+dependencies = [
+ "derive_builder_core 0.20.0",
+ "syn 2.0.71",
+]
+
 [[package]]
 name = "derive_more"
 version = "0.99.18"
@@ -11879,7 +11910,7 @@ dependencies = [
  "create-output-dir",
  "data-encoding",
  "deno_task_shell",
- "derive_builder",
+ "derive_builder 0.20.0",
  "directories",
  "dunce",
  "fs4",
@@ -11955,7 +11986,7 @@ version = "1.12.0"
 source = "git+https://github.com/software-mansion/scarb?tag=v2.7.0-rc.4#88bf93564b905336e6f34e0243e30ce7ce8859ec"
 dependencies = [
  "camino",
- "derive_builder",
+ "derive_builder 0.20.0",
  "semver 1.0.23",
  "serde",
  "serde_json",
@@ -15310,7 +15341,7 @@ source = "git+https://github.com/cartridge-gg/wasm-webauthn?rev=972693f#972693fd
 dependencies = [
  "ciborium",
  "coset",
- "derive_builder",
+ "derive_builder 0.12.0",
  "js-sys",
  "serde",
  "serde-wasm-bindgen",
diff --git a/bin/torii/src/main.rs b/bin/torii/src/main.rs
index 27731e05a4..d9035fc612 100644
--- a/bin/torii/src/main.rs
+++ b/bin/torii/src/main.rs
@@ -33,6 +33,7 @@ use torii_core::processors::register_model::RegisterModelProcessor;
 use torii_core::processors::store_del_record::StoreDelRecordProcessor;
 use torii_core::processors::store_set_record::StoreSetRecordProcessor;
 use torii_core::processors::store_transaction::StoreTransactionProcessor;
+use torii_core::processors::store_update_member::StoreUpdateMemberProcessor;
 use torii_core::processors::store_update_record::StoreUpdateRecordProcessor;
 use torii_core::simple_broker::SimpleBroker;
 use torii_core::sql::Sql;
@@ -172,6 +173,7 @@ async fn main() -> anyhow::Result<()> {
             Box::new(StoreDelRecordProcessor),
             Box::new(EventMessageProcessor),
             Box::new(StoreUpdateRecordProcessor),
+            Box::new(StoreUpdateMemberProcessor),
         ],
         transaction: vec![Box::new(StoreTransactionProcessor)],
         ..Processors::default()
diff --git a/crates/dojo-core/src/world/world_contract.cairo b/crates/dojo-core/src/world/world_contract.cairo
index 8270e8eca2..a84d4e7754 100644
--- a/crates/dojo-core/src/world/world_contract.cairo
+++ b/crates/dojo-core/src/world/world_contract.cairo
@@ -145,6 +145,7 @@ pub mod world {
         ModelRegistered: ModelRegistered,
         StoreSetRecord: StoreSetRecord,
         StoreUpdateRecord: StoreUpdateRecord,
+        StoreUpdateMember: StoreUpdateMember,
         StoreDelRecord: StoreDelRecord,
         WriterUpdated: WriterUpdated,
         OwnerUpdated: OwnerUpdated,
@@ -219,6 +220,14 @@ pub mod world {
         pub values: Span<felt252>,
     }
 
+    #[derive(Drop, starknet::Event)]
+    pub struct StoreUpdateMember {
+        pub table: felt252,
+        pub entity_id: felt252,
+        pub member_selector: felt252,
+        pub values: Span<felt252>,
+    }
+
     #[derive(Drop, starknet::Event)]
     pub struct StoreDelRecord {
         pub table: felt252,
@@ -821,10 +830,18 @@ pub mod world {
                     );
                 },
                 ModelIndex::MemberId((
-                    entity_id, member_id
+                    entity_id, member_selector
                 )) => {
-                    self.write_model_member(model_selector, entity_id, member_id, values, layout);
-                    // TODO: here we need a new event update and see how Torii can process that.
+                    self
+                        .write_model_member(
+                            model_selector, entity_id, member_selector, values, layout
+                        );
+                    EventEmitter::emit(
+                        ref self,
+                        StoreUpdateMember {
+                            table: model_selector, entity_id, member_selector, values
+                        }
+                    );
                 }
             }
         }
diff --git a/crates/dojo-lang/src/manifest_test_data/compiler_cairo/manifests/dev/base/abis/dojo-world.json b/crates/dojo-lang/src/manifest_test_data/compiler_cairo/manifests/dev/base/abis/dojo-world.json
index b12806373b..62ff4b6bfa 100644
--- a/crates/dojo-lang/src/manifest_test_data/compiler_cairo/manifests/dev/base/abis/dojo-world.json
+++ b/crates/dojo-lang/src/manifest_test_data/compiler_cairo/manifests/dev/base/abis/dojo-world.json
@@ -975,6 +975,33 @@
       }
     ]
   },
+  {
+    "type": "event",
+    "name": "dojo::world::world_contract::world::StoreUpdateMember",
+    "kind": "struct",
+    "members": [
+      {
+        "name": "table",
+        "type": "core::felt252",
+        "kind": "data"
+      },
+      {
+        "name": "entity_id",
+        "type": "core::felt252",
+        "kind": "data"
+      },
+      {
+        "name": "member_selector",
+        "type": "core::felt252",
+        "kind": "data"
+      },
+      {
+        "name": "values",
+        "type": "core::array::Span::<core::felt252>",
+        "kind": "data"
+      }
+    ]
+  },
   {
     "type": "event",
     "name": "dojo::world::world_contract::world::StoreDelRecord",
@@ -1156,6 +1183,11 @@
         "type": "dojo::world::world_contract::world::StoreUpdateRecord",
         "kind": "nested"
       },
+      {
+        "name": "StoreUpdateMember",
+        "type": "dojo::world::world_contract::world::StoreUpdateMember",
+        "kind": "nested"
+      },
       {
         "name": "StoreDelRecord",
         "type": "dojo::world::world_contract::world::StoreDelRecord",
diff --git a/crates/dojo-lang/src/manifest_test_data/compiler_cairo/manifests/dev/base/dojo-world.toml b/crates/dojo-lang/src/manifest_test_data/compiler_cairo/manifests/dev/base/dojo-world.toml
index 3390095088..59d4719031 100644
--- a/crates/dojo-lang/src/manifest_test_data/compiler_cairo/manifests/dev/base/dojo-world.toml
+++ b/crates/dojo-lang/src/manifest_test_data/compiler_cairo/manifests/dev/base/dojo-world.toml
@@ -1,6 +1,6 @@
 kind = "Class"
-class_hash = "0x4c90da98d2bad157dec1d7b9b9c8c5861828a7ec1b323425d84fa6c3071303f"
-original_class_hash = "0x4c90da98d2bad157dec1d7b9b9c8c5861828a7ec1b323425d84fa6c3071303f"
+class_hash = "0x2178527e9556d1aa21d3c2961d28f9114fcfed81b4c3674ed591c50ce46cc9d"
+original_class_hash = "0x2178527e9556d1aa21d3c2961d28f9114fcfed81b4c3674ed591c50ce46cc9d"
 abi = "manifests/dev/base/abis/dojo-world.json"
 tag = "dojo-world"
 manifest_name = "dojo-world"
diff --git a/crates/dojo-world/src/contracts/abi/world.rs b/crates/dojo-world/src/contracts/abi/world.rs
index bed453d1cc..afca797f35 100644
--- a/crates/dojo-world/src/contracts/abi/world.rs
+++ b/crates/dojo-world/src/contracts/abi/world.rs
@@ -981,6 +981,33 @@ abigen!(
       }
     ]
   },
+  {
+    "type": "event",
+    "name": "dojo::world::world_contract::world::StoreUpdateMember",
+    "kind": "struct",
+    "members": [
+      {
+        "name": "table",
+        "type": "core::felt252",
+        "kind": "data"
+      },
+      {
+        "name": "entity_id",
+        "type": "core::felt252",
+        "kind": "data"
+      },
+      {
+        "name": "member_selector",
+        "type": "core::felt252",
+        "kind": "data"
+      },
+      {
+        "name": "values",
+        "type": "core::array::Span::<core::felt252>",
+        "kind": "data"
+      }
+    ]
+  },
   {
     "type": "event",
     "name": "dojo::world::world_contract::world::StoreDelRecord",
@@ -1162,6 +1189,11 @@ abigen!(
         "type": "dojo::world::world_contract::world::StoreUpdateRecord",
         "kind": "nested"
       },
+      {
+        "name": "StoreUpdateMember",
+        "type": "dojo::world::world_contract::world::StoreUpdateMember",
+        "kind": "nested"
+      },
       {
         "name": "StoreDelRecord",
         "type": "dojo::world::world_contract::world::StoreDelRecord",
diff --git a/crates/sozo/ops/src/events.rs b/crates/sozo/ops/src/events.rs
index d6b3729277..9e48af7583 100644
--- a/crates/sozo/ops/src/events.rs
+++ b/crates/sozo/ops/src/events.rs
@@ -291,7 +291,7 @@ mod tests {
         let result = extract_events(&manifest, &project_dir, &target_dir).unwrap();
 
         // we are just collecting all events from manifest file so just verifying count should work
-        assert_eq!(result.len(), 17);
+        assert_eq!(result.len(), 18);
     }
 
     #[test]
diff --git a/crates/sozo/ops/src/tests/model.rs b/crates/sozo/ops/src/tests/model.rs
index 2a2bb94cf2..fb7da33f5e 100644
--- a/crates/sozo/ops/src/tests/model.rs
+++ b/crates/sozo/ops/src/tests/model.rs
@@ -37,7 +37,7 @@ async fn test_model_ops() {
         )
         .await
         .unwrap(),
-        Felt::from_hex("0x2b14bbb22e6a21cc949e06a187436c96aeab0e0290b3a8d91fb357ed2e6d973")
+        Felt::from_hex("0x4eddd8563a17c7d256b35e3cb0decdfcdfe122dd72593ebc572cfc535941ac2")
             .unwrap()
     );
 
diff --git a/crates/torii/core/src/processors/mod.rs b/crates/torii/core/src/processors/mod.rs
index 6f53b567dc..e2b22e4d75 100644
--- a/crates/torii/core/src/processors/mod.rs
+++ b/crates/torii/core/src/processors/mod.rs
@@ -12,6 +12,7 @@ pub mod register_model;
 pub mod store_del_record;
 pub mod store_set_record;
 pub mod store_transaction;
+pub mod store_update_member;
 pub mod store_update_record;
 
 const MODEL_INDEX: usize = 0;
diff --git a/crates/torii/core/src/processors/store_update_member.rs b/crates/torii/core/src/processors/store_update_member.rs
new file mode 100644
index 0000000000..a7ddcab839
--- /dev/null
+++ b/crates/torii/core/src/processors/store_update_member.rs
@@ -0,0 +1,108 @@
+use anyhow::{Context, Error, Result};
+use async_trait::async_trait;
+use dojo_world::contracts::model::ModelReader;
+use dojo_world::contracts::naming;
+use dojo_world::contracts::world::WorldContractReader;
+use num_traits::ToPrimitive;
+use starknet::core::types::{Event, TransactionReceiptWithBlockInfo};
+use starknet::core::utils::get_selector_from_name;
+use starknet::providers::Provider;
+use tracing::{info, warn};
+
+use super::EventProcessor;
+use crate::processors::{ENTITY_ID_INDEX, MODEL_INDEX};
+use crate::sql::Sql;
+
+pub(crate) const LOG_TARGET: &str = "torii_core::processors::store_update_member";
+
+const MEMBER_INDEX: usize = 2;
+
+#[derive(Default, Debug)]
+pub struct StoreUpdateMemberProcessor;
+
+#[async_trait]
+impl<P> EventProcessor<P> for StoreUpdateMemberProcessor
+where
+    P: Provider + Send + Sync + std::fmt::Debug,
+{
+    fn event_key(&self) -> String {
+        "StoreUpdateMember".to_string()
+    }
+
+    fn validate(&self, event: &Event) -> bool {
+        if event.keys.len() > 1 {
+            info!(
+                target: LOG_TARGET,
+                event_key = %<StoreUpdateMemberProcessor as EventProcessor<P>>::event_key(self),
+                invalid_keys = %<StoreUpdateMemberProcessor as EventProcessor<P>>::event_keys_as_string(self, event),
+                "Invalid event keys."
+            );
+            return false;
+        }
+        true
+    }
+
+    async fn process(
+        &self,
+        _world: &WorldContractReader<P>,
+        db: &mut Sql,
+        _block_number: u64,
+        block_timestamp: u64,
+        _transaction_receipt: &TransactionReceiptWithBlockInfo,
+        event_id: &str,
+        event: &Event,
+    ) -> Result<(), Error> {
+        let selector = event.data[MODEL_INDEX];
+        let entity_id = event.data[ENTITY_ID_INDEX];
+        let member_selector = event.data[MEMBER_INDEX];
+
+        let model = db.model(selector).await?;
+        let schema = model.schema().await?;
+
+        let mut member = schema
+            .as_struct()
+            .expect("model schema must be a struct")
+            .children
+            .iter()
+            .find(|c| {
+                get_selector_from_name(&c.name).expect("invalid selector for member name")
+                    == member_selector
+            })
+            .context("member not found")?
+            .clone();
+
+        info!(
+            target: LOG_TARGET,
+            name = %model.name(),
+            entity_id = format!("{:#x}", entity_id),
+            member = %member.name,
+            "Store update member.",
+        );
+
+        let values_start = MEMBER_INDEX + 1;
+        let values_end: usize =
+            values_start + event.data[values_start].to_usize().context("invalid usize")?;
+
+        // Skip the length to only get the values as they will be deserialized.
+        let mut values = event.data[values_start + 1..=values_end].to_vec();
+
+        let tag = naming::get_tag(model.namespace(), model.name());
+
+        if !db.does_entity_exist(tag.clone(), entity_id).await? {
+            warn!(
+                target: LOG_TARGET,
+                tag,
+                entity_id = format!("{:#x}", entity_id),
+                "Entity not found, must be set before updating a member.",
+            );
+
+            return Ok(());
+        }
+
+        member.ty.deserialize(&mut values)?;
+
+        db.set_model_member(&schema.name(), entity_id, false, &member, event_id, block_timestamp)
+            .await?;
+        Ok(())
+    }
+}
diff --git a/crates/torii/core/src/sql.rs b/crates/torii/core/src/sql.rs
index 69edbc3d70..776f3754ea 100644
--- a/crates/torii/core/src/sql.rs
+++ b/crates/torii/core/src/sql.rs
@@ -4,7 +4,7 @@ use std::str::FromStr;
 use anyhow::{anyhow, Result};
 use chrono::Utc;
 use dojo_types::primitive::Primitive;
-use dojo_types::schema::{EnumOption, Member, Ty};
+use dojo_types::schema::{EnumOption, Member, Struct, Ty};
 use dojo_world::contracts::abi::model::Layout;
 use dojo_world::contracts::naming::compute_selector_from_names;
 use dojo_world::metadata::WorldMetadata;
@@ -23,6 +23,9 @@ use crate::types::{
 };
 use crate::utils::{must_utc_datetime_from_timestamp, utc_dt_string_from_timestamp};
 
+type IsEventMessage = bool;
+type IsStoreUpdateMember = bool;
+
 pub const FELT_DELIMITER: &str = "/";
 
 #[cfg(test)]
@@ -201,7 +204,7 @@ impl Sql {
             path,
             event_id,
             (&entity_id, false),
-            &entity,
+            (&entity, false),
             block_timestamp,
             &vec![],
         );
@@ -260,7 +263,7 @@ impl Sql {
             path,
             event_id,
             (&entity_id, true),
-            &entity,
+            (&entity, false),
             block_timestamp,
             &vec![],
         );
@@ -271,6 +274,35 @@ impl Sql {
         Ok(())
     }
 
+    pub async fn set_model_member(
+        &mut self,
+        model_tag: &str,
+        entity_id: Felt,
+        is_event_message: bool,
+        member: &Member,
+        event_id: &str,
+        block_timestamp: u64,
+    ) -> Result<()> {
+        let entity_id = format!("{:#x}", entity_id);
+        let path = vec![model_tag.to_string()];
+
+        let wrapped_ty =
+            Ty::Struct(Struct { name: model_tag.to_string(), children: vec![member.clone()] });
+
+        // update model member
+        self.build_set_entity_queries_recursive(
+            path,
+            event_id,
+            (&entity_id, is_event_message),
+            (&wrapped_ty, true),
+            block_timestamp,
+            &vec![],
+        );
+        self.query_queue.execute_all().await?;
+
+        Ok(())
+    }
+
     pub async fn delete_entity(&mut self, entity_id: Felt, entity: Ty) -> Result<()> {
         let entity_id = format!("{:#x}", entity_id);
         let path = vec![entity.name()];
@@ -383,14 +415,13 @@ impl Sql {
         Ok(keys)
     }
 
-    pub async fn entity(&self, model: String, key: Felt) -> Result<Vec<Felt>> {
-        let query = sqlx::query_as::<_, (i32, String, String)>("SELECT * FROM ? WHERE id = ?")
-            .bind(model)
-            .bind(format!("{:#x}", key));
+    pub async fn does_entity_exist(&self, model: String, key: Felt) -> Result<bool> {
+        let sql = format!("SELECT COUNT(*) FROM [{model}] WHERE id = ?");
 
-        let mut conn: PoolConnection<Sqlite> = self.pool.acquire().await?;
-        let row: (i32, String, String) = query.fetch_one(&mut *conn).await?;
-        Ok(serde_json::from_str(&row.2).unwrap())
+        let count: i64 =
+            sqlx::query_scalar(&sql).bind(format!("{:#x}", key)).fetch_one(&self.pool).await?;
+
+        Ok(count > 0)
     }
 
     pub async fn entities(&self, model: String) -> Result<Vec<Vec<Felt>>> {
@@ -561,12 +592,13 @@ impl Sql {
         path: Vec<String>,
         event_id: &str,
         // The id of the entity and if the entity is an event message
-        entity_id: (&str, bool),
-        entity: &Ty,
+        entity_id: (&str, IsEventMessage),
+        entity: (&Ty, IsStoreUpdateMember),
         block_timestamp: u64,
         indexes: &Vec<i64>,
     ) {
         let (entity_id, is_event_message) = entity_id;
+        let (entity, is_store_update_member) = entity;
 
         let update_members =
             |members: &[Member], query_queue: &mut QueryQueue, indexes: &Vec<i64>| {
@@ -629,11 +661,31 @@ impl Sql {
                 }
 
                 let placeholders: Vec<&str> = arguments.iter().map(|_| "?").collect();
-                let statement = format!(
-                    "INSERT OR REPLACE INTO [{table_id}] ({}) VALUES ({})",
-                    columns.join(","),
-                    placeholders.join(",")
-                );
+                let statement = if is_store_update_member && indexes.is_empty() {
+                    arguments.push(Argument::String(if is_event_message {
+                        "event:".to_string() + entity_id
+                    } else {
+                        entity_id.to_string()
+                    }));
+
+                    // row has to exist. update it directly
+                    format!(
+                        "UPDATE [{table_id}] SET {updates} WHERE id = ?",
+                        table_id = table_id,
+                        updates = columns
+                            .iter()
+                            .zip(placeholders.iter())
+                            .map(|(column, placeholder)| format!("{} = {}", column, placeholder))
+                            .collect::<Vec<String>>()
+                            .join(", ")
+                    )
+                } else {
+                    format!(
+                        "INSERT OR REPLACE INTO [{table_id}] ({}) VALUES ({})",
+                        columns.join(","),
+                        placeholders.join(",")
+                    )
+                };
 
                 query_queue.enqueue(statement, arguments);
             };
@@ -649,7 +701,7 @@ impl Sql {
                         path_clone,
                         event_id,
                         (entity_id, is_event_message),
-                        &member.ty,
+                        (&member.ty, is_store_update_member),
                         block_timestamp,
                         indexes,
                     );
@@ -685,7 +737,7 @@ impl Sql {
                             path_clone,
                             event_id,
                             (entity_id, is_event_message),
-                            &option.ty,
+                            (&option.ty, is_store_update_member),
                             block_timestamp,
                             indexes,
                         );
@@ -714,7 +766,7 @@ impl Sql {
                         path_clone,
                         event_id,
                         (entity_id, is_event_message),
-                        member,
+                        (member, is_store_update_member),
                         block_timestamp,
                         indexes,
                     );
@@ -752,7 +804,7 @@ impl Sql {
                         path_clone,
                         event_id,
                         (entity_id, is_event_message),
-                        member,
+                        (member, is_store_update_member),
                         block_timestamp,
                         &indexes,
                     );
diff --git a/examples/spawn-and-move/Scarb.toml b/examples/spawn-and-move/Scarb.toml
index c6cc3f9fd5..4489b63feb 100644
--- a/examples/spawn-and-move/Scarb.toml
+++ b/examples/spawn-and-move/Scarb.toml
@@ -40,7 +40,7 @@ rpc_url = "http://localhost:5050/"
 # Default account for katana with seed = 0
 account_address = "0x6162896d1d7ab204c7ccac6dd5f8e9e7c25ecd5ae4fcb4ad32e57786bb46e03"
 private_key = "0x1800000000300000180000000000030000000000003006001800006600"
-world_address = "0x74c73d35df54ddc53bcf34aab5e0dbb09c447e99e01f4d69535441253c9571a"
+world_address = "0x25e74888e786245ec7aa93d846b2cc9e4b49a5244209860bbf4b384f654521b"
 
 [profile.release.tool.dojo]
 # for more info on how `merge-strategy` works see:
diff --git a/examples/spawn-and-move/manifests/dev/base/abis/contracts/dojo_examples-actions-40b6994c.json b/examples/spawn-and-move/manifests/dev/base/abis/contracts/dojo_examples-actions-40b6994c.json
index 3d21bef6a6..ac6c7ed557 100644
--- a/examples/spawn-and-move/manifests/dev/base/abis/contracts/dojo_examples-actions-40b6994c.json
+++ b/examples/spawn-and-move/manifests/dev/base/abis/contracts/dojo_examples-actions-40b6994c.json
@@ -228,6 +228,24 @@
       }
     ]
   },
+  {
+    "type": "struct",
+    "name": "dojo_examples::models::PlayerItem",
+    "members": [
+      {
+        "name": "item_id",
+        "type": "core::integer::u32"
+      },
+      {
+        "name": "quantity",
+        "type": "core::integer::u32"
+      },
+      {
+        "name": "score",
+        "type": "core::integer::i32"
+      }
+    ]
+  },
   {
     "type": "interface",
     "name": "dojo_examples::actions::IActions",
@@ -288,11 +306,11 @@
       },
       {
         "type": "function",
-        "name": "update_player_name_value",
+        "name": "update_player_items",
         "inputs": [
           {
-            "name": "name",
-            "type": "core::byte_array::ByteArray"
+            "name": "items",
+            "type": "core::array::Array::<dojo_examples::models::PlayerItem>"
           }
         ],
         "outputs": [],
diff --git a/examples/spawn-and-move/manifests/dev/base/abis/dojo-world.json b/examples/spawn-and-move/manifests/dev/base/abis/dojo-world.json
index b12806373b..62ff4b6bfa 100644
--- a/examples/spawn-and-move/manifests/dev/base/abis/dojo-world.json
+++ b/examples/spawn-and-move/manifests/dev/base/abis/dojo-world.json
@@ -975,6 +975,33 @@
       }
     ]
   },
+  {
+    "type": "event",
+    "name": "dojo::world::world_contract::world::StoreUpdateMember",
+    "kind": "struct",
+    "members": [
+      {
+        "name": "table",
+        "type": "core::felt252",
+        "kind": "data"
+      },
+      {
+        "name": "entity_id",
+        "type": "core::felt252",
+        "kind": "data"
+      },
+      {
+        "name": "member_selector",
+        "type": "core::felt252",
+        "kind": "data"
+      },
+      {
+        "name": "values",
+        "type": "core::array::Span::<core::felt252>",
+        "kind": "data"
+      }
+    ]
+  },
   {
     "type": "event",
     "name": "dojo::world::world_contract::world::StoreDelRecord",
@@ -1156,6 +1183,11 @@
         "type": "dojo::world::world_contract::world::StoreUpdateRecord",
         "kind": "nested"
       },
+      {
+        "name": "StoreUpdateMember",
+        "type": "dojo::world::world_contract::world::StoreUpdateMember",
+        "kind": "nested"
+      },
       {
         "name": "StoreDelRecord",
         "type": "dojo::world::world_contract::world::StoreDelRecord",
diff --git a/examples/spawn-and-move/manifests/dev/base/contracts/dojo_examples-actions-40b6994c.toml b/examples/spawn-and-move/manifests/dev/base/contracts/dojo_examples-actions-40b6994c.toml
index 36e30d588b..d6647ceeca 100644
--- a/examples/spawn-and-move/manifests/dev/base/contracts/dojo_examples-actions-40b6994c.toml
+++ b/examples/spawn-and-move/manifests/dev/base/contracts/dojo_examples-actions-40b6994c.toml
@@ -1,6 +1,6 @@
 kind = "DojoContract"
-class_hash = "0x5d3ffcdabbf541ac1ce9df26f275d6abaec2c260d7a698e1c94a4bd1a0482b8"
-original_class_hash = "0x5d3ffcdabbf541ac1ce9df26f275d6abaec2c260d7a698e1c94a4bd1a0482b8"
+class_hash = "0x2a8de224c28cae3049e23b352e7fce6f26cc99884331e5f2a6aea261398a27a"
+original_class_hash = "0x2a8de224c28cae3049e23b352e7fce6f26cc99884331e5f2a6aea261398a27a"
 base_class_hash = "0x0"
 abi = "manifests/dev/base/abis/contracts/dojo_examples-actions-40b6994c.json"
 reads = []
diff --git a/examples/spawn-and-move/manifests/dev/base/dojo-world.toml b/examples/spawn-and-move/manifests/dev/base/dojo-world.toml
index 3390095088..59d4719031 100644
--- a/examples/spawn-and-move/manifests/dev/base/dojo-world.toml
+++ b/examples/spawn-and-move/manifests/dev/base/dojo-world.toml
@@ -1,6 +1,6 @@
 kind = "Class"
-class_hash = "0x4c90da98d2bad157dec1d7b9b9c8c5861828a7ec1b323425d84fa6c3071303f"
-original_class_hash = "0x4c90da98d2bad157dec1d7b9b9c8c5861828a7ec1b323425d84fa6c3071303f"
+class_hash = "0x2178527e9556d1aa21d3c2961d28f9114fcfed81b4c3674ed591c50ce46cc9d"
+original_class_hash = "0x2178527e9556d1aa21d3c2961d28f9114fcfed81b4c3674ed591c50ce46cc9d"
 abi = "manifests/dev/base/abis/dojo-world.json"
 tag = "dojo-world"
 manifest_name = "dojo-world"
diff --git a/examples/spawn-and-move/manifests/dev/deployment/abis/contracts/dojo_examples-actions-40b6994c.json b/examples/spawn-and-move/manifests/dev/deployment/abis/contracts/dojo_examples-actions-40b6994c.json
index 3d21bef6a6..ac6c7ed557 100644
--- a/examples/spawn-and-move/manifests/dev/deployment/abis/contracts/dojo_examples-actions-40b6994c.json
+++ b/examples/spawn-and-move/manifests/dev/deployment/abis/contracts/dojo_examples-actions-40b6994c.json
@@ -228,6 +228,24 @@
       }
     ]
   },
+  {
+    "type": "struct",
+    "name": "dojo_examples::models::PlayerItem",
+    "members": [
+      {
+        "name": "item_id",
+        "type": "core::integer::u32"
+      },
+      {
+        "name": "quantity",
+        "type": "core::integer::u32"
+      },
+      {
+        "name": "score",
+        "type": "core::integer::i32"
+      }
+    ]
+  },
   {
     "type": "interface",
     "name": "dojo_examples::actions::IActions",
@@ -288,11 +306,11 @@
       },
       {
         "type": "function",
-        "name": "update_player_name_value",
+        "name": "update_player_items",
         "inputs": [
           {
-            "name": "name",
-            "type": "core::byte_array::ByteArray"
+            "name": "items",
+            "type": "core::array::Array::<dojo_examples::models::PlayerItem>"
           }
         ],
         "outputs": [],
diff --git a/examples/spawn-and-move/manifests/dev/deployment/abis/dojo-world.json b/examples/spawn-and-move/manifests/dev/deployment/abis/dojo-world.json
index b12806373b..62ff4b6bfa 100644
--- a/examples/spawn-and-move/manifests/dev/deployment/abis/dojo-world.json
+++ b/examples/spawn-and-move/manifests/dev/deployment/abis/dojo-world.json
@@ -975,6 +975,33 @@
       }
     ]
   },
+  {
+    "type": "event",
+    "name": "dojo::world::world_contract::world::StoreUpdateMember",
+    "kind": "struct",
+    "members": [
+      {
+        "name": "table",
+        "type": "core::felt252",
+        "kind": "data"
+      },
+      {
+        "name": "entity_id",
+        "type": "core::felt252",
+        "kind": "data"
+      },
+      {
+        "name": "member_selector",
+        "type": "core::felt252",
+        "kind": "data"
+      },
+      {
+        "name": "values",
+        "type": "core::array::Span::<core::felt252>",
+        "kind": "data"
+      }
+    ]
+  },
   {
     "type": "event",
     "name": "dojo::world::world_contract::world::StoreDelRecord",
@@ -1156,6 +1183,11 @@
         "type": "dojo::world::world_contract::world::StoreUpdateRecord",
         "kind": "nested"
       },
+      {
+        "name": "StoreUpdateMember",
+        "type": "dojo::world::world_contract::world::StoreUpdateMember",
+        "kind": "nested"
+      },
       {
         "name": "StoreDelRecord",
         "type": "dojo::world::world_contract::world::StoreDelRecord",
diff --git a/examples/spawn-and-move/manifests/dev/deployment/manifest.json b/examples/spawn-and-move/manifests/dev/deployment/manifest.json
index 7b64c57f07..c7d42bb7df 100644
--- a/examples/spawn-and-move/manifests/dev/deployment/manifest.json
+++ b/examples/spawn-and-move/manifests/dev/deployment/manifest.json
@@ -1,8 +1,8 @@
 {
   "world": {
     "kind": "WorldContract",
-    "class_hash": "0x4c90da98d2bad157dec1d7b9b9c8c5861828a7ec1b323425d84fa6c3071303f",
-    "original_class_hash": "0x4c90da98d2bad157dec1d7b9b9c8c5861828a7ec1b323425d84fa6c3071303f",
+    "class_hash": "0x2178527e9556d1aa21d3c2961d28f9114fcfed81b4c3674ed591c50ce46cc9d",
+    "original_class_hash": "0x2178527e9556d1aa21d3c2961d28f9114fcfed81b4c3674ed591c50ce46cc9d",
     "abi": [
       {
         "type": "impl",
@@ -980,6 +980,33 @@
           }
         ]
       },
+      {
+        "type": "event",
+        "name": "dojo::world::world_contract::world::StoreUpdateMember",
+        "kind": "struct",
+        "members": [
+          {
+            "name": "table",
+            "type": "core::felt252",
+            "kind": "data"
+          },
+          {
+            "name": "entity_id",
+            "type": "core::felt252",
+            "kind": "data"
+          },
+          {
+            "name": "member_selector",
+            "type": "core::felt252",
+            "kind": "data"
+          },
+          {
+            "name": "values",
+            "type": "core::array::Span::<core::felt252>",
+            "kind": "data"
+          }
+        ]
+      },
       {
         "type": "event",
         "name": "dojo::world::world_contract::world::StoreDelRecord",
@@ -1161,6 +1188,11 @@
             "type": "dojo::world::world_contract::world::StoreUpdateRecord",
             "kind": "nested"
           },
+          {
+            "name": "StoreUpdateMember",
+            "type": "dojo::world::world_contract::world::StoreUpdateMember",
+            "kind": "nested"
+          },
           {
             "name": "StoreDelRecord",
             "type": "dojo::world::world_contract::world::StoreDelRecord",
@@ -1189,8 +1221,8 @@
         ]
       }
     ],
-    "address": "0x74c73d35df54ddc53bcf34aab5e0dbb09c447e99e01f4d69535441253c9571a",
-    "transaction_hash": "0x34ee5ea074c7c5c2b1cfbcb96b49758d18552139a0463d5f0f6758a403c29cc",
+    "address": "0x25e74888e786245ec7aa93d846b2cc9e4b49a5244209860bbf4b384f654521b",
+    "transaction_hash": "0x1606f5a86180d90027d33915cf0d62e117f778f8837df3c1375af3d3bc2951e",
     "block_number": 3,
     "seed": "dojo_examples",
     "metadata": {
@@ -1210,9 +1242,9 @@
   "contracts": [
     {
       "kind": "DojoContract",
-      "address": "0x2d24481107b55ecd73c4d1b62f6bfe8c42a224447b71db7dcec2eab484d53cd",
-      "class_hash": "0x5d3ffcdabbf541ac1ce9df26f275d6abaec2c260d7a698e1c94a4bd1a0482b8",
-      "original_class_hash": "0x5d3ffcdabbf541ac1ce9df26f275d6abaec2c260d7a698e1c94a4bd1a0482b8",
+      "address": "0x24d926d75cd84104c3bd24f0f79e95c273d6a99ed449f3c8b83114857020332",
+      "class_hash": "0x2a8de224c28cae3049e23b352e7fce6f26cc99884331e5f2a6aea261398a27a",
+      "original_class_hash": "0x2a8de224c28cae3049e23b352e7fce6f26cc99884331e5f2a6aea261398a27a",
       "base_class_hash": "0x2427dd10a58850ac9a5ca6ce04b7771b05330fd18f2e481831ad903b969e6b2",
       "abi": [
         {
@@ -1444,6 +1476,24 @@
             }
           ]
         },
+        {
+          "type": "struct",
+          "name": "dojo_examples::models::PlayerItem",
+          "members": [
+            {
+              "name": "item_id",
+              "type": "core::integer::u32"
+            },
+            {
+              "name": "quantity",
+              "type": "core::integer::u32"
+            },
+            {
+              "name": "score",
+              "type": "core::integer::i32"
+            }
+          ]
+        },
         {
           "type": "interface",
           "name": "dojo_examples::actions::IActions",
@@ -1504,11 +1554,11 @@
             },
             {
               "type": "function",
-              "name": "update_player_name_value",
+              "name": "update_player_items",
               "inputs": [
                 {
-                  "name": "name",
-                  "type": "core::byte_array::ByteArray"
+                  "name": "items",
+                  "type": "core::array::Array::<dojo_examples::models::PlayerItem>"
                 }
               ],
               "outputs": [],
@@ -1641,7 +1691,7 @@
     },
     {
       "kind": "DojoContract",
-      "address": "0x454e4731e29aad869794ce03040f1bd866556132b0e633a376918ee17801f5e",
+      "address": "0x31a348061c348eb84d7d9f1658244432170822cdb1a97a586805b565c168bcf",
       "class_hash": "0x45ad5a298db270a9c3ee439b7a7a008e3219b70937cfaa144589866442f3908",
       "original_class_hash": "0x45ad5a298db270a9c3ee439b7a7a008e3219b70937cfaa144589866442f3908",
       "base_class_hash": "0x2427dd10a58850ac9a5ca6ce04b7771b05330fd18f2e481831ad903b969e6b2",
@@ -1878,7 +1928,7 @@
     },
     {
       "kind": "DojoContract",
-      "address": "0x57d20e85621372042af6b626884361c1c64c701b0b7db985d10faf92aa0dedc",
+      "address": "0x4aee4238ae328cfe7ad116057e3e9ef083b75f13c1914a8f93ef32549ebe808",
       "class_hash": "0x3daab1621bba5f43f0d84f8f68ee7a5dfa4d83f98f746e2e9dcd3a848233e35",
       "original_class_hash": "0x3daab1621bba5f43f0d84f8f68ee7a5dfa4d83f98f746e2e9dcd3a848233e35",
       "base_class_hash": "0x2427dd10a58850ac9a5ca6ce04b7771b05330fd18f2e481831ad903b969e6b2",
@@ -2097,7 +2147,7 @@
     },
     {
       "kind": "DojoContract",
-      "address": "0x52da0b3df1cb3f0627dbe75960ae5ebad647b6ade1930dc9a499c0475168754",
+      "address": "0x1c6c32fc58a703d08ba0080ebf840e9c8021e86c37b239d28ce1a4576709ddc",
       "class_hash": "0x647fc1b2d2e902e6304e127b36995d8f57fe45c38e38e15d8860db508dbf24a",
       "original_class_hash": "0x647fc1b2d2e902e6304e127b36995d8f57fe45c38e38e15d8860db508dbf24a",
       "base_class_hash": "0x2427dd10a58850ac9a5ca6ce04b7771b05330fd18f2e481831ad903b969e6b2",
diff --git a/examples/spawn-and-move/manifests/dev/deployment/manifest.toml b/examples/spawn-and-move/manifests/dev/deployment/manifest.toml
index 5a398195aa..064976b859 100644
--- a/examples/spawn-and-move/manifests/dev/deployment/manifest.toml
+++ b/examples/spawn-and-move/manifests/dev/deployment/manifest.toml
@@ -1,10 +1,10 @@
 [world]
 kind = "WorldContract"
-class_hash = "0x4c90da98d2bad157dec1d7b9b9c8c5861828a7ec1b323425d84fa6c3071303f"
-original_class_hash = "0x4c90da98d2bad157dec1d7b9b9c8c5861828a7ec1b323425d84fa6c3071303f"
+class_hash = "0x2178527e9556d1aa21d3c2961d28f9114fcfed81b4c3674ed591c50ce46cc9d"
+original_class_hash = "0x2178527e9556d1aa21d3c2961d28f9114fcfed81b4c3674ed591c50ce46cc9d"
 abi = "manifests/dev/deployment/abis/dojo-world.json"
-address = "0x74c73d35df54ddc53bcf34aab5e0dbb09c447e99e01f4d69535441253c9571a"
-transaction_hash = "0x34ee5ea074c7c5c2b1cfbcb96b49758d18552139a0463d5f0f6758a403c29cc"
+address = "0x25e74888e786245ec7aa93d846b2cc9e4b49a5244209860bbf4b384f654521b"
+transaction_hash = "0x1606f5a86180d90027d33915cf0d62e117f778f8837df3c1375af3d3bc2951e"
 block_number = 3
 seed = "dojo_examples"
 manifest_name = "dojo-world"
@@ -23,9 +23,9 @@ manifest_name = "dojo-base"
 
 [[contracts]]
 kind = "DojoContract"
-address = "0x2d24481107b55ecd73c4d1b62f6bfe8c42a224447b71db7dcec2eab484d53cd"
-class_hash = "0x5d3ffcdabbf541ac1ce9df26f275d6abaec2c260d7a698e1c94a4bd1a0482b8"
-original_class_hash = "0x5d3ffcdabbf541ac1ce9df26f275d6abaec2c260d7a698e1c94a4bd1a0482b8"
+address = "0x24d926d75cd84104c3bd24f0f79e95c273d6a99ed449f3c8b83114857020332"
+class_hash = "0x2a8de224c28cae3049e23b352e7fce6f26cc99884331e5f2a6aea261398a27a"
+original_class_hash = "0x2a8de224c28cae3049e23b352e7fce6f26cc99884331e5f2a6aea261398a27a"
 base_class_hash = "0x2427dd10a58850ac9a5ca6ce04b7771b05330fd18f2e481831ad903b969e6b2"
 abi = "manifests/dev/deployment/abis/contracts/dojo_examples-actions-40b6994c.json"
 reads = []
@@ -40,7 +40,7 @@ manifest_name = "dojo_examples-actions-40b6994c"
 
 [[contracts]]
 kind = "DojoContract"
-address = "0x454e4731e29aad869794ce03040f1bd866556132b0e633a376918ee17801f5e"
+address = "0x31a348061c348eb84d7d9f1658244432170822cdb1a97a586805b565c168bcf"
 class_hash = "0x45ad5a298db270a9c3ee439b7a7a008e3219b70937cfaa144589866442f3908"
 original_class_hash = "0x45ad5a298db270a9c3ee439b7a7a008e3219b70937cfaa144589866442f3908"
 base_class_hash = "0x2427dd10a58850ac9a5ca6ce04b7771b05330fd18f2e481831ad903b969e6b2"
@@ -54,7 +54,7 @@ manifest_name = "dojo_examples-dungeon-6620e0e6"
 
 [[contracts]]
 kind = "DojoContract"
-address = "0x57d20e85621372042af6b626884361c1c64c701b0b7db985d10faf92aa0dedc"
+address = "0x4aee4238ae328cfe7ad116057e3e9ef083b75f13c1914a8f93ef32549ebe808"
 class_hash = "0x3daab1621bba5f43f0d84f8f68ee7a5dfa4d83f98f746e2e9dcd3a848233e35"
 original_class_hash = "0x3daab1621bba5f43f0d84f8f68ee7a5dfa4d83f98f746e2e9dcd3a848233e35"
 base_class_hash = "0x2427dd10a58850ac9a5ca6ce04b7771b05330fd18f2e481831ad903b969e6b2"
@@ -68,7 +68,7 @@ manifest_name = "dojo_examples-mock_token-31599eb2"
 
 [[contracts]]
 kind = "DojoContract"
-address = "0x52da0b3df1cb3f0627dbe75960ae5ebad647b6ade1930dc9a499c0475168754"
+address = "0x1c6c32fc58a703d08ba0080ebf840e9c8021e86c37b239d28ce1a4576709ddc"
 class_hash = "0x647fc1b2d2e902e6304e127b36995d8f57fe45c38e38e15d8860db508dbf24a"
 original_class_hash = "0x647fc1b2d2e902e6304e127b36995d8f57fe45c38e38e15d8860db508dbf24a"
 base_class_hash = "0x2427dd10a58850ac9a5ca6ce04b7771b05330fd18f2e481831ad903b969e6b2"
diff --git a/examples/spawn-and-move/manifests/release/base/abis/contracts/dojo_examples-actions-40b6994c.json b/examples/spawn-and-move/manifests/release/base/abis/contracts/dojo_examples-actions-40b6994c.json
index 3d21bef6a6..ac6c7ed557 100644
--- a/examples/spawn-and-move/manifests/release/base/abis/contracts/dojo_examples-actions-40b6994c.json
+++ b/examples/spawn-and-move/manifests/release/base/abis/contracts/dojo_examples-actions-40b6994c.json
@@ -228,6 +228,24 @@
       }
     ]
   },
+  {
+    "type": "struct",
+    "name": "dojo_examples::models::PlayerItem",
+    "members": [
+      {
+        "name": "item_id",
+        "type": "core::integer::u32"
+      },
+      {
+        "name": "quantity",
+        "type": "core::integer::u32"
+      },
+      {
+        "name": "score",
+        "type": "core::integer::i32"
+      }
+    ]
+  },
   {
     "type": "interface",
     "name": "dojo_examples::actions::IActions",
@@ -288,11 +306,11 @@
       },
       {
         "type": "function",
-        "name": "update_player_name_value",
+        "name": "update_player_items",
         "inputs": [
           {
-            "name": "name",
-            "type": "core::byte_array::ByteArray"
+            "name": "items",
+            "type": "core::array::Array::<dojo_examples::models::PlayerItem>"
           }
         ],
         "outputs": [],
diff --git a/examples/spawn-and-move/manifests/release/base/abis/dojo-world.json b/examples/spawn-and-move/manifests/release/base/abis/dojo-world.json
index b12806373b..62ff4b6bfa 100644
--- a/examples/spawn-and-move/manifests/release/base/abis/dojo-world.json
+++ b/examples/spawn-and-move/manifests/release/base/abis/dojo-world.json
@@ -975,6 +975,33 @@
       }
     ]
   },
+  {
+    "type": "event",
+    "name": "dojo::world::world_contract::world::StoreUpdateMember",
+    "kind": "struct",
+    "members": [
+      {
+        "name": "table",
+        "type": "core::felt252",
+        "kind": "data"
+      },
+      {
+        "name": "entity_id",
+        "type": "core::felt252",
+        "kind": "data"
+      },
+      {
+        "name": "member_selector",
+        "type": "core::felt252",
+        "kind": "data"
+      },
+      {
+        "name": "values",
+        "type": "core::array::Span::<core::felt252>",
+        "kind": "data"
+      }
+    ]
+  },
   {
     "type": "event",
     "name": "dojo::world::world_contract::world::StoreDelRecord",
@@ -1156,6 +1183,11 @@
         "type": "dojo::world::world_contract::world::StoreUpdateRecord",
         "kind": "nested"
       },
+      {
+        "name": "StoreUpdateMember",
+        "type": "dojo::world::world_contract::world::StoreUpdateMember",
+        "kind": "nested"
+      },
       {
         "name": "StoreDelRecord",
         "type": "dojo::world::world_contract::world::StoreDelRecord",
diff --git a/examples/spawn-and-move/manifests/release/base/contracts/dojo_examples-actions-40b6994c.toml b/examples/spawn-and-move/manifests/release/base/contracts/dojo_examples-actions-40b6994c.toml
index 6c912bbe36..a12c96a2e4 100644
--- a/examples/spawn-and-move/manifests/release/base/contracts/dojo_examples-actions-40b6994c.toml
+++ b/examples/spawn-and-move/manifests/release/base/contracts/dojo_examples-actions-40b6994c.toml
@@ -1,6 +1,6 @@
 kind = "DojoContract"
-class_hash = "0x5d3ffcdabbf541ac1ce9df26f275d6abaec2c260d7a698e1c94a4bd1a0482b8"
-original_class_hash = "0x5d3ffcdabbf541ac1ce9df26f275d6abaec2c260d7a698e1c94a4bd1a0482b8"
+class_hash = "0x2a8de224c28cae3049e23b352e7fce6f26cc99884331e5f2a6aea261398a27a"
+original_class_hash = "0x2a8de224c28cae3049e23b352e7fce6f26cc99884331e5f2a6aea261398a27a"
 base_class_hash = "0x0"
 abi = "manifests/release/base/abis/contracts/dojo_examples-actions-40b6994c.json"
 reads = []
diff --git a/examples/spawn-and-move/manifests/release/base/dojo-world.toml b/examples/spawn-and-move/manifests/release/base/dojo-world.toml
index b984a39658..cc1f0eda6a 100644
--- a/examples/spawn-and-move/manifests/release/base/dojo-world.toml
+++ b/examples/spawn-and-move/manifests/release/base/dojo-world.toml
@@ -1,6 +1,6 @@
 kind = "Class"
-class_hash = "0x4c90da98d2bad157dec1d7b9b9c8c5861828a7ec1b323425d84fa6c3071303f"
-original_class_hash = "0x4c90da98d2bad157dec1d7b9b9c8c5861828a7ec1b323425d84fa6c3071303f"
+class_hash = "0x2178527e9556d1aa21d3c2961d28f9114fcfed81b4c3674ed591c50ce46cc9d"
+original_class_hash = "0x2178527e9556d1aa21d3c2961d28f9114fcfed81b4c3674ed591c50ce46cc9d"
 abi = "manifests/release/base/abis/dojo-world.json"
 tag = "dojo-world"
 manifest_name = "dojo-world"
diff --git a/examples/spawn-and-move/src/actions.cairo b/examples/spawn-and-move/src/actions.cairo
index b966441e49..64248db5d2 100644
--- a/examples/spawn-and-move/src/actions.cairo
+++ b/examples/spawn-and-move/src/actions.cairo
@@ -1,4 +1,4 @@
-use dojo_examples::models::{Direction, Position, Vec2};
+use dojo_examples::models::{Direction, Position, Vec2, PlayerItem};
 
 #[dojo::interface]
 pub trait IActions {
@@ -7,7 +7,7 @@ pub trait IActions {
     fn set_player_config(ref world: IWorldDispatcher, name: ByteArray);
     fn get_player_position(world: @IWorldDispatcher) -> Position;
     fn update_player_name(ref world: IWorldDispatcher, name: ByteArray);
-    fn update_player_name_value(ref world: IWorldDispatcher, name: ByteArray);
+    fn update_player_items(ref world: IWorldDispatcher, items: Array<PlayerItem>);
     fn reset_player_config(ref world: IWorldDispatcher);
     fn set_player_server_profile(ref world: IWorldDispatcher, server_id: u32, name: ByteArray);
     #[cfg(feature: 'dungeon')]
@@ -28,7 +28,7 @@ pub mod actions {
     use starknet::{ContractAddress, get_caller_address};
     use dojo_examples::models::{
         Position, Moves, Direction, Vec2, PlayerConfig, PlayerItem, ServerProfile, PositionStore,
-        MovesStore, MovesEntityStore, PlayerConfigStore, PlayerConfigEntityStore
+        MovesStore, MovesEntityStore, PlayerConfigStore, PlayerConfigEntityStore,
     };
     use dojo_examples::utils::next_position;
 
@@ -177,15 +177,22 @@ pub mod actions {
             assert(new_name == name, 'unable to change name');
         }
 
-        fn update_player_name_value(ref world: IWorldDispatcher, name: ByteArray) {
+        fn update_player_items(ref world: IWorldDispatcher, items: Array<PlayerItem>) {
             let player = get_caller_address();
             let config_id = PlayerConfigStore::entity_id_from_keys(player);
 
+            let items_clone = items.clone();
+
             let config = PlayerConfigEntityStore::get(world, config_id);
-            config.set_name(world, name.clone());
+            config.set_items(world, items);
 
-            let new_name = PlayerConfigEntityStore::get_name(world, config_id);
-            assert(new_name == name, 'unable to change name');
+            let new_items = PlayerConfigEntityStore::get_items(world, config_id);
+            let mut size = items_clone.len();
+
+            while size > 0 {
+                assert(new_items.at(size - 1) == items_clone.at(size - 1), 'item not found');
+                size -= 1;
+            }
         }
     }
 
diff --git a/examples/spawn-and-move/src/models.cairo b/examples/spawn-and-move/src/models.cairo
index ddd61efb92..094ec84eab 100644
--- a/examples/spawn-and-move/src/models.cairo
+++ b/examples/spawn-and-move/src/models.cairo
@@ -70,7 +70,7 @@ pub struct Position {
 
 // Every field inside a model must derive `Introspect` or `IntrospectPacked`.
 // `IntrospectPacked` can also be used into models that are only using `Introspect`.
-#[derive(Copy, Drop, Serde, Introspect)]
+#[derive(Copy, Drop, Serde, Introspect, PartialEq)]
 pub struct PlayerItem {
     pub item_id: u32,
     pub quantity: u32,