{
  "manageEntity": {
    "action": "Save",
    "entityId": "367983",
    "entityType": "Track",
    "nonce": "0xa6fe3b7c46ec40357831ce8b04753a81086924bccca0c7ddfdbca775ddd92944",
    "signature": "0xc6fba920ac5d1ea5c2cdca112b8e61e251283674cec34e30eaf9258e9cb5b34625e32b3baf666524866d69f7d1f647d02e211ac12279543d0e64c65db9358b6c1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}