diff --git a/libraries/gateway-client/Cargo.toml b/libraries/gateway-client/Cargo.toml
index 29b47c91..f7520c84 100644
--- a/libraries/gateway-client/Cargo.toml
+++ b/libraries/gateway-client/Cargo.toml
@@ -6,7 +6,7 @@ edition.workspace = true
 
 [dependencies]
 serde = { version = "1.0.195", features = ["derive"] }
-serde_with = { version = "3.5.1" }
+serde_with = { version = "3.5.1", features = ["hex"] }
 serde_json = { version = "1.0.111" }
 url = { version = "2.5.0" }
 uuid = { version = "1.7.0", features = ["serde", "v4"] }
diff --git a/libraries/gateway-client/src/models/events_item.rs b/libraries/gateway-client/src/models/events_item.rs
index 9e6b786a..cf99446b 100644
--- a/libraries/gateway-client/src/models/events_item.rs
+++ b/libraries/gateway-client/src/models/events_item.rs
@@ -6,14 +6,14 @@ pub struct EventsItem {
     #[serde(rename = "emitter")]
     pub emitter: serde_json::Value,
     #[serde(rename = "data")]
-    pub data: Box<crate::models::ProgrammaticScryptoSborValue>,
+    pub data: Box<serde_json::Value>,
 }
 
 impl EventsItem {
     pub fn new(
         name: String,
         emitter: serde_json::Value,
-        data: crate::models::ProgrammaticScryptoSborValue,
+        data: serde_json::Value,
     ) -> EventsItem {
         EventsItem {
             name,
diff --git a/libraries/gateway-client/src/models/mod.rs b/libraries/gateway-client/src/models/mod.rs
index 7220f81b..759d34fc 100644
--- a/libraries/gateway-client/src/models/mod.rs
+++ b/libraries/gateway-client/src/models/mod.rs
@@ -365,7 +365,7 @@ pub use self::transaction_preview_response::TransactionPreviewResponse;
 pub mod transaction_preview_response_logs_inner;
 pub use self::transaction_preview_response_logs_inner::TransactionPreviewResponseLogsInner;
 pub mod transaction_receipt;
-pub use self::transaction_receipt::TransactionReceipt;
+pub use self::transaction_receipt::{Entity, StateUpdates, TransactionReceipt};
 pub mod transaction_status;
 pub use self::transaction_status::TransactionStatus;
 pub mod transaction_status_request;
diff --git a/libraries/gateway-client/src/models/public_key.rs b/libraries/gateway-client/src/models/public_key.rs
index d5d29a17..6a95950d 100644
--- a/libraries/gateway-client/src/models/public_key.rs
+++ b/libraries/gateway-client/src/models/public_key.rs
@@ -1,3 +1,15 @@
+#[serde_with::serde_as]
 #[derive(Clone, Debug, PartialEq, serde::Serialize, serde::Deserialize)]
-#[serde(tag = "")]
-pub enum PublicKey {}
+#[serde(tag = "key_type")]
+pub enum PublicKey {
+    EcdsaSecp256k1 {
+        #[serde_as(as = "serde_with::hex::Hex")]
+        #[serde(rename = "key_hex")]
+        key: [u8; 33],
+    },
+    EddsaEd25519 {
+        #[serde_as(as = "serde_with::hex::Hex")]
+        #[serde(rename = "key_hex")]
+        key: [u8; 32],
+    },
+}
diff --git a/libraries/gateway-client/src/models/transaction_preview_response.rs b/libraries/gateway-client/src/models/transaction_preview_response.rs
index a9c31bc4..7952307c 100644
--- a/libraries/gateway-client/src/models/transaction_preview_response.rs
+++ b/libraries/gateway-client/src/models/transaction_preview_response.rs
@@ -1,8 +1,9 @@
+#[serde_with::serde_as]
 #[derive(Clone, Debug, PartialEq, serde::Serialize, serde::Deserialize)]
 pub struct TransactionPreviewResponse {
     #[serde(rename = "encoded_receipt")]
-    pub encoded_receipt: String,
-
+    #[serde_as(as = "serde_with::hex::Hex")]
+    pub encoded_receipt: Vec<u8>,
     #[serde(rename = "receipt")]
     pub receipt: serde_json::Value,
     #[serde(rename = "resource_changes")]
@@ -13,7 +14,7 @@ pub struct TransactionPreviewResponse {
 
 impl TransactionPreviewResponse {
     pub fn new(
-        encoded_receipt: String,
+        encoded_receipt: Vec<u8>,
         receipt: serde_json::Value,
         resource_changes: Vec<serde_json::Value>,
         logs: Vec<crate::models::TransactionPreviewResponseLogsInner>,
diff --git a/libraries/gateway-client/src/models/transaction_receipt.rs b/libraries/gateway-client/src/models/transaction_receipt.rs
index 5f6c2487..2767cf96 100644
--- a/libraries/gateway-client/src/models/transaction_receipt.rs
+++ b/libraries/gateway-client/src/models/transaction_receipt.rs
@@ -19,13 +19,10 @@ pub struct TransactionReceipt {
 
     #[serde(rename = "fee_source", skip_serializing_if = "Option::is_none")]
     pub fee_source: Option<serde_json::Value>,
-
     #[serde(rename = "state_updates", skip_serializing_if = "Option::is_none")]
-    pub state_updates: Option<serde_json::Value>,
-
+    pub state_updates: Option<StateUpdates>,
     #[serde(rename = "next_epoch", skip_serializing_if = "Option::is_none")]
     pub next_epoch: Option<serde_json::Value>,
-
     #[serde(rename = "output", skip_serializing_if = "Option::is_none")]
     pub output: Option<serde_json::Value>,
 
@@ -63,3 +60,15 @@ impl TransactionReceipt {
         }
     }
 }
+
+#[derive(Clone, Debug, PartialEq, Eq, serde::Serialize, serde::Deserialize)]
+pub struct StateUpdates {
+    pub new_global_entities: Vec<Entity>,
+}
+
+#[derive(Clone, Debug, PartialEq, Eq, serde::Serialize, serde::Deserialize)]
+pub struct Entity {
+    pub is_global: bool,
+    pub entity_type: String,
+    pub entity_address: String,
+}
diff --git a/libraries/gateway-client/src/models/transaction_submit_request.rs b/libraries/gateway-client/src/models/transaction_submit_request.rs
index 7f41dd45..fc49cba8 100644
--- a/libraries/gateway-client/src/models/transaction_submit_request.rs
+++ b/libraries/gateway-client/src/models/transaction_submit_request.rs
@@ -1,13 +1,15 @@
+#[serde_with::serde_as]
 #[derive(Clone, Debug, PartialEq, serde::Serialize, serde::Deserialize)]
 pub struct TransactionSubmitRequest {
     #[serde(rename = "notarized_transaction_hex")]
-    pub notarized_transaction_hex: String,
+    #[serde_as(as = "serde_with::hex::Hex")]
+    pub notarized_transaction: Vec<u8>,
 }
 
 impl TransactionSubmitRequest {
-    pub fn new(notarized_transaction_hex: String) -> TransactionSubmitRequest {
+    pub fn new(notarized_transaction: Vec<u8>) -> TransactionSubmitRequest {
         TransactionSubmitRequest {
-            notarized_transaction_hex,
+            notarized_transaction,
         }
     }
 }