{
  "manageEntity": {
    "action": "Save",
    "entityId": "483411924",
    "entityType": "Track",
    "nonce": "0x1b790295890a0ab8f4b4235b37d644e017922e99fe303074d4eb8b912838c647",
    "signature": "0xfd26010c7baece3213720889792674e5b41bddcf3c32018d5dbef521c0b4dde14dbcae31b85408e8e4d741d2173f54b614ac952510e39d973fbfb17a1d349de61b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}