{
  "manageEntity": {
    "action": "Save",
    "entityId": "574199",
    "entityType": "Track",
    "nonce": "0xadfad10e1e1cd7427bbf39097ba776d4f92f7e9fe0a531f2b155e81dc7f3761d",
    "signature": "0xefb300a898601244ff359c6f5c82dc21c0fe280cf49558d0e770ca4ea19cf1474d2a0f0d16facc538ed3aa1f4a08a896469dfe281baa31f424eaa25c0bdc635b1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}