{
  "manageEntity": {
    "action": "Save",
    "entityId": "1930097799",
    "entityType": "Track",
    "nonce": "0x3f818a0957e3bf01958197dc7788d392de6a3c2abd319dc2e96dd335dc552a0b",
    "signature": "0x75ed121f067e63bacc24b91d1f36e4cb6d01aedb918657dfa2d714be57026067740328c2e2afe4d05f55899f383b43429b4fb779e8674506c2eacfb3a03cf6881c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}