{
  "-1": "Unknown error occurred, Please try again later",
  "-2": "Request Parameter Error: {param}",
  "-3": "Bad Request",  
  "404": "Resource not found",
  "501": "Internal Server Error",
  "20000": "User does not exist",
  "40000": "Unauthorized",
  "40001": "Forbidden",
  "40002": "Forbidden",
  "40003": "Forbidden"
}