/// @param[out] json - pointer with the DynamicField converted into json object
///
/// @return True if VehicleMessage has been transformed into json object
/// and false if not. In such case, a json object is returned { "error": "error msg"}
///
/// @param[out] json - pointer with the DynamicField converted into json object
///
/// @return True if VehicleMessage has been transformed into json object
/// and false if not. In such case, a json object is returned { "error": "error msg"}
///