{
  "manageEntity": {
    "action": "Save",
    "entityId": "50747216",
    "entityType": "Track",
    "nonce": "0x0928deb4522380712af18f18bec117f3d68a3e33cd5271d6c387047af92572d0",
    "signature": "0x72ffe9ed9f013a10f204b257f3fe5fdefe511d0165e4652ac0666c34a6ca28cc72ad96b587255b5b7d84694cc30d384a5ca4a84f79fc3c6d784776322cf30e921b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}