Params conversion error raises internal error #123

{
  "jsonrpc": "2.0",
  "error": {
    "code": -32603,
    "message": "Internal Error",
    "data": {
      "ClassName": "System.ArgumentException",
      "Message": "Невозможно преобразовать объект типа 'Newtonsoft.Json.Linq.JValue' к типу 'System.Guid'.",
      "Data": null,
      "InnerException": null,
      "HelpURL": null,
      "StackTraceString": "   в System.RuntimeType.TryChangeType(Object value, Binder binder, CultureInfo culture, Boolean needsSpecialCast)\\r\\n   в System.RuntimeType.CheckValue(Object value, Binder binder, CultureInfo culture, BindingFlags invokeAttr)\\r\\n   в System.Reflection.MethodBase.CheckArguments(Object[] parameters, Binder binder, BindingFlags invokeAttr, CultureInfo culture, Signature sig)\\r\\n   в System.Reflection.RuntimeMethodInfo.InvokeArgumentsCheck(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)\\r\\n   в System.Delegate.DynamicInvokeImpl(Object[] args)\\r\\n   в System.Delegate.DynamicInvoke(Object[] args)\\r\\n   в AustinHarris.JsonRpc.Handler.Handle(JsonRequest Rpc, Object RpcContext)",
      "RemoteStackTraceString": null,
      "RemoteStackIndex": 0,
      "ExceptionMethod": "8\\nTryChangeType\\nmscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089\\nSystem.RuntimeType\\nSystem.Object TryChangeType(System.Object, System.Reflection.Binder, System.Globalization.CultureInfo, Boolean)",
      "HResult": -2147024809,
      "Source": "mscorlib",
      "WatsonBuckets": null,
      "ParamName": null
    }
  },
  "id": "0d1b763d-e0cb-4261-818e-02d439eea8f4"
}