{
  "manageEntity": {
    "action": "Save",
    "entityId": "408095151",
    "entityType": "Track",
    "nonce": "0x35c3136d4bdc03845aa3bcd34a5b63979aa6c12beadd3519052e06911d9eda22",
    "signature": "0xb3ce08e051578334c0ba795e7a84e3506d4235ded0e46d1cc9a67c12f271c0427166b949a8364b9256d39c737b6ef6ba4af84cc4599955ff7fec44538fbc12c71b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}