{
  "manageEntity": {
    "action": "Save",
    "entityId": "1885238566",
    "entityType": "Track",
    "nonce": "0x31754a79e0959b0468364059b0bf7904cd223d183629a53f31a06bcca5ff0e32",
    "signature": "0x7f8eb916b78759821646cbc9fe8cdeac093d613df2d7daac9a6c156c106e4a4b1da8c010ed1b01ba52cc7d22ec9c01600f79f6edb005ea034e02d125685990541b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}