failure.response.contract.json

{
    "status": 401                        // this doesn't have to be repeated, since it is in HTTP header
    
    "message": "Something failed",       // a client-facing meaningful/descriptive message
    
    "exception": "SomeException",        // this is helpful to nail down error message
    
    "code": 10034                        // this is helpful to point user to particular configuration section, etc.
    
    "more_info": "http://www.."          // where client can get more information
}