{
  "manageEntity": {
    "action": "Save",
    "entityId": "2019411737",
    "entityType": "Track",
    "nonce": "0x0da5e1e93f35a9d114e660ca192e6384079ad17dd76033b67e19b728a8ee0c2e",
    "signature": "0x06ed252bc681ce7c8f63658bae4c9c37c9661607211f9dbf67f5f61e33732f6e5157278f542c330d1e0b16ba85f0b8f0d83877136794dc945e970a06de1084db1b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}