{
  "manageEntity": {
    "action": "Save",
    "entityId": "1874672827",
    "entityType": "Track",
    "nonce": "0x126ff04fe0164f2b0fe3a9018b78bc4e65eaab6739ee6cf5727e5bc7df3eac9e",
    "signature": "0x4832408de76fd005998a5529e0bc22f054d8964d0dbf91888f0e3fef26c61f213450e7b1af36a444753115612891c487d5f1b97163ac8d37c1ffa917d131f7d01b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}