{
  "manageEntity": {
    "action": "Save",
    "entityId": "1415450699",
    "entityType": "Track",
    "nonce": "0x61c96183651f78b9f973aad28b73dca5d11c92fe6686cc0d6008ae8475225773",
    "signature": "0x97eb2271c0b9a7f6bfc4451e5108a2fef3f8d5a3b9f8863d659fc988531b25196e9762cc63dc7c0609fd1acf36705417e0f5f97f4c365918bf3f2def0fa00db91b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}