{
  "manageEntity": {
    "action": "Save",
    "entityId": "827699138",
    "entityType": "Track",
    "nonce": "0x47dcdd0ce69354bace46f03d2922505a77af46a770eea829f9a9e6f146c3edee",
    "signature": "0x6dc787aae59ed1d96431d6962fdced1ac889bb4718ed7234d10db996a6443f153877e21b3a1f97ca65f07abf9ad317a6a782961f1104784b83d17b64bc1f52201b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}