{
  "sessionId": "session-fixture",
  "correlationId": "gateway-correlation-authenticate-missing-payload",
  "kind": "MX_COMMAND_KIND_AUTHENTICATE_USER",
  "protocolStatus": {
    "code": "PROTOCOL_STATUS_CODE_OK",
    "message": "AuthenticateUser reached MXAccess."
  },
  "diagnosticMessage": "Malformed: the OK reply carried neither an AuthenticateUser payload nor a return_value."
}