{
  "manageEntity": {
    "action": "Save",
    "entityId": "412807368",
    "entityType": "Track",
    "nonce": "0xdb05868ff8b0f8d7d9be1d26483f46899795e52ac8dee3d85eeef9acf6f288d8",
    "signature": "0x4d1830608f0060eeca405cc7ebe3b314c0f3aa4725b3e5a0e94ec3dbb30a2f665f215b730f64d532b31b9a388eaec6bc95416eb495aec14058704c8e9640d1641b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}