{
  "manageEntity": {
    "action": "Save",
    "entityId": "616872447",
    "entityType": "Track",
    "nonce": "0xcab08cb3d797140ed35e24c0c84eb4046e2e74b544ddca16e1d61df7dedbd4f4",
    "signature": "0x705043d22baa98a55fe803f2f1e1b69ef08416d949086f1550e5bc6bae1cd01000f53c7fadad2a15e70c03d550127368a260f8fc16a47e34fdfeba441bca47f01b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}