{
  "manageEntity": {
    "action": "Save",
    "entityId": "1308221612",
    "entityType": "Track",
    "nonce": "0x35bd1102ff4806ff7551ce8b8b44a8d0423713b753c03ab24b1a515002f8ba95",
    "signature": "0xf730f4f95f79459db120b6968eea5343f7a7fdf835db8436aa069edc16cbd60419f0526434a28f4d644fbb67377a372c8244a8ddd01ec50d0bd63bd1f2c0418d1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}