ErrorResponse

{
  "error": {
    "code": String,
    "details": Object,
    "message": String
  }
}

{
  "error": {
    "code": "error_code",
    "details": {
      "body.fileSize": {
        "message": "min 0",
        "value": -1
      },
      "body.mime": {
        "message": "Not match in '[a-z0-9]+/[a-z0-9]+'",
        "value": "image-jpeg"
      }
    },
    "message": "Error message."
  }
}