diff --git a/server/src/http/dyn_contract.rs b/server/src/http/dyn_contract.rs
index 3114982..a9c8da7 100644
--- a/server/src/http/dyn_contract.rs
+++ b/server/src/http/dyn_contract.rs
@@ -1,4 +1,5 @@
 use alloy::hex;
+use alloy::json_abi::Param;
 use alloy::{
     dyn_abi::{DynSolType, DynSolValue, JsonAbiExt},
     json_abi::{Function, JsonAbi},
@@ -213,6 +214,54 @@ impl ContractCall {
         })
     }
 
+    fn json_to_sol(
+        json_values: &[JsonValue],
+        json_abi_params: &[Param],
+    ) -> Result<Vec<DynSolValue>, String> {
+        if json_values.len() != json_abi_params.len() {
+            return Err(format!(
+                "Parameter count mismatch: expected {}, got {}",
+                json_abi_params.len(),
+                json_values.len()
+            ));
+        }
+
+        let mut parsed_params = Vec::new();
+
+        for (json_value, json_abi_param) in json_values.iter().zip(json_abi_params.iter()) {
+            if json_abi_param.is_complex_type() {
+                let json_value = json_value
+                    .as_array()
+                    .ok_or_else(|| "Expected array for complex type".to_string())?;
+
+                let dyn_sol_value = Self::json_to_sol(json_value, &json_abi_param.components)?;
+
+                parsed_params.push(DynSolValue::Tuple(dyn_sol_value));
+            } else {
+                let sol_type: DynSolType = json_abi_param
+                    .ty
+                    .parse()
+                    .map_err(|e| format!("Invalid Solidity type '{}': {}", json_abi_param.ty, e))?;
+
+                let parsed_value: DynSolValue = sol_type
+                    .coerce_json(json_value)
+                    .map_err(|e| format!("Failed to parse parameter as DynSolValue: {}", e))?;
+
+                if !parsed_value.matches(&sol_type) {
+                    return Err(format!(
+                        "Parameter type mismatch: expected {}, got {:?}",
+                        json_abi_param.ty,
+                        parsed_value.as_type()
+                    ));
+                }
+
+                parsed_params.push(parsed_value);
+            }
+        }
+
+        Ok(parsed_params)
+    }
+
     /// Encodes parameters using serde to directly deserialize into DynSolValue
     pub fn encode_parameters(
         &self,
@@ -231,39 +280,9 @@ impl ContractCall {
             ));
         }
 
-        let mut parsed_params = Vec::new();
-
-        for (param, input) in self.params.iter().zip(function.inputs.iter()) {
-            let sol_type: DynSolType = input.ty.parse().map_err(|e| {
-                EngineError::contract_preparation_error(
-                    Some(self.contract_address),
-                    chain_id,
-                    format!("Invalid Solidity type '{}': {}", input.ty, e),
-                )
-            })?;
-
-            let parsed_value: DynSolValue = sol_type.coerce_json(param).map_err(|e| {
-                EngineError::contract_preparation_error(
-                    Some(self.contract_address),
-                    chain_id,
-                    format!("Failed to parse parameter as DynSolValue: {}", e),
-                )
-            })?;
-
-            if !parsed_value.matches(&sol_type) {
-                return Err(EngineError::contract_preparation_error(
-                    Some(self.contract_address),
-                    chain_id,
-                    format!(
-                        "Parameter type mismatch: expected {}, got {:?}",
-                        input.ty,
-                        parsed_value.as_type()
-                    ),
-                ));
-            }
-
-            parsed_params.push(parsed_value);
-        }
+        let parsed_params = Self::json_to_sol(&self.params, &function.inputs).map_err(|e| {
+            EngineError::contract_preparation_error(Some(self.contract_address), chain_id, e)
+        })?;
 
         function.abi_encode_input(&parsed_params).map_err(|e| {
             EngineError::contract_preparation_error(