{
  "manageEntity": {
    "action": "Save",
    "entityId": "1498717660",
    "entityType": "Track",
    "nonce": "0x3376966e533af9cb28d81c0feae371b047c823f14ef0b487663501beeb5ac1cb",
    "signature": "0x81e0329b4abf6d0676a82fcbfee0691254037f5fb801d3c4190a62859a1684be281be9db6f2972f34a5eb178c4076f751f2abca26b6bd2b8f3446bfca317ff121b",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}