{
  "manageEntity": {
    "action": "Save",
    "entityId": "365597795",
    "entityType": "Track",
    "nonce": "0xc289f662a16db715bc3f2b6757c96152caba7e520ba16ee6e25a6a28f75ffde5",
    "signature": "0x1eb841fc25ea00180e94304c15f1347a269b186b1338b411d9b2440dc603706a527221dd4514cfb08e0d8db2aaf869263ca8092e0157af11e0e2934b463cbd631b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}