chromium/google_apis/test/data/drive/error.json

{
  "error": {
    "errors": [
      {
        "domain": "global",
        "reason": "conditionNotMet",
        "message": "Precondition Failed",
        "locationType": "header",
        "location": "If-Match",
        "debugInfo": "code: CONDITION_NOT_MET\nhttp status: 412\ncause: ...",
      }
    ],
    "code": 412,
    "message": "Precondition Failed"
  }
}