{
  "manageEntity": {
    "action": "Save",
    "entityId": "198787",
    "entityType": "Track",
    "nonce": "0x3dc0939adf42eb7e2e2be75807d1e209ec90707f5c257d233c046a2ffc0598d0",
    "signature": "0x458082571c818eb17a68a6f163c9200fbe8a9af63ec8b774fdebeb671a8e7796064009a74e113ffd25bf31699b13d7e9f5bed6b1e6786b685517a4164ab773661b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}