{
  "manageEntity": {
    "action": "Save",
    "entityId": "267952",
    "entityType": "Track",
    "nonce": "0x412369b7248b3eee86160633e354c2ac1e4faa081dda9aee707a8c35f3e0b894",
    "signature": "0x53157fef8e34c184a87bc52cfcaa53567102adb34801a55572914d996c775f3d4e62d6914fc27cd9936865f396321f6e633b696624e0d9e10a87507dc17def401c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}