{
  "manageEntity": {
    "action": "Save",
    "entityId": "1864833369",
    "entityType": "Track",
    "nonce": "0x5ccc4550a287b9678c27383809d4954c339a2a2eeb8214881e94f8f6db85464c",
    "signature": "0xe21becbe5cb6a4069f95a7b52f6c29f03794c5c4966cb201c302b54a06b366b273424c92f6290a2c72a44db11141d3bcf0775502317ea5af9746d8022fcec8e31c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}