{
  "manageEntity": {
    "action": "Save",
    "entityId": "836510310",
    "entityType": "Track",
    "nonce": "0x0a06c5fb3bc4b56629b5a7e32ccc14e3c8553120ae08f5452f003401be5061d8",
    "signature": "0xdd32f2a5ce960e6343085cc42b318a45af6ed5accde564446574e067b38f63dd2d482b5c40f1c6df874c3940b8ddc0d92e9599a028023d1d315ded2c7de171851c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}