{
  "manageEntity": {
    "action": "Save",
    "entityId": "51338",
    "entityType": "Track",
    "nonce": "0x67d79fd1d4fb2dc7c62930dd4b223bb4e8b7c44e2e1a1f29f40aaedde676a1a5",
    "signature": "0x8038bd01561658a605de2143e5097238b1ba10f23ee1c7d14cd579a57d8f2cd92899cc800ba243e40fb637af2ac67b9894643e0757e1e27daac3cbfd88a3eb231b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}