{
  "manageEntity": {
    "action": "Save",
    "entityId": "1416322668",
    "entityType": "Track",
    "nonce": "0xc2b126541e4c066069886fbf7bfee78ad2df48ed4f3767516f22602285e66f01",
    "signature": "0x72fe2d145a313a2747f078f5eee794aea424738be8ea3a8e94cac4f55ecd78383142fb6ba1f38f40cf2362ec247c924abfaa44d187b0cb96a07fc8472e5b56e41c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}