{
  "manageEntity": {
    "action": "Save",
    "entityId": "2067557878",
    "entityType": "Track",
    "nonce": "0xceee8f06035862d600d868e08d9c372fec269e3fd45334f60b8264f95b2ae70a",
    "signature": "0xee980a7c3a6243a95b768bf458f47de81bfeb08e13161f0ccd4b5e1931a75d46409afbf87546d5ae01347bcb709482223524e4980d369b146e290ab632f433061c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}