{
  "manageEntity": {
    "action": "Save",
    "entityId": "770061",
    "entityType": "Track",
    "nonce": "0x28e76658a6010e77a13503415a26f5182952c3b8ff7cdc72400fbd532447aba4",
    "signature": "0x1b29239e246e8f1eae76daa3f692e86a37ae4bf708283245c4bf62fbbe614e1b549bbeee076acc0267280d2e9ac111d1224d5d1f4ac0b88159899bdbdf400c281b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}