{
  "manageEntity": {
    "action": "Save",
    "entityId": "1081374489",
    "entityType": "Track",
    "nonce": "0xdf0190fe87f93b2ee6a306e8325d2016d89038b827203439b11cdc1808daffb3",
    "signature": "0xc41e4a9707a709d35d76c191c3b74b7a39c1934129ee83c4372d1af1e679ee506b8ec3ae6769b6ff842056ddfa29c5d30d5d5a15850b8706e04126f140934ebc1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}