{
  "manageEntity": {
    "action": "Save",
    "entityId": "801188",
    "entityType": "Track",
    "nonce": "0x2089e27d466ce6e9f728901790025ba30d42bc11c1e44ba297b986a20d028334",
    "signature": "0x062863c7455448a19aa2844c39f1ba7dcf022ad0934192ea46063be6f51869e864158d4d39f963bd03eec188133cca9ce34dd85172c750cef7572a78d2d5c98f1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}