Fix CustomOperation schema

schemas/operations/custom_operation.py

@@ -3,6 +3,7 @@ from __future__ import annotations
 from pydantic import Field
 
 from schemas.fields.basic import AccountName
+from schemas.fields.hex import Hex
 from schemas.fields.integers import Uint16t
 from schemas.operation import Operation
 
@@ -13,4 +14,4 @@ class CustomOperation(Operation):
 
     required_auths: list[AccountName]
     id_: Uint16t = Field(alias="id")
-    data: list[str]
+    data: Hex