{
  "manageEntity": {
    "action": "Save",
    "entityId": "533900",
    "entityType": "Track",
    "nonce": "0xdc5320ae3c199960a57fe4175bc9e7f8b029a953b3b3ad0ce2a21e1ad46a9dd3",
    "signature": "0xbff60e65d48b6af602ba10408f99e4bcd9247f5172f83f4469cac9e7a5a50f213a95de9ecf871fdc1e9ef24f187a8852252551aec644d71d45a7f98925993dd01c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}