{
  "manageEntity": {
    "action": "Save",
    "entityId": "1368641500",
    "entityType": "Track",
    "nonce": "0x2c12992fbfa7d056cf191da66880decc96b36eb676fc1d781726c090e081ff52",
    "signature": "0x3248adb205c3e2577172d5266c07d41dc7b760068b737bdf523ef94b59474541766ac5494fc01424dfdcd5c66b57595da55d656368f9a2169f38a1f366a07d921b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}