{
  "manageEntity": {
    "action": "Save",
    "entityId": "971636413",
    "entityType": "Track",
    "nonce": "0xdbd1a3e28851eec49efc554624c4059251c6f23ccb1a67d22afb7f9f7ba91ea4",
    "signature": "0xda887f8e6360e267ae3c178b1bec5bfae7ee293dbc490aea287c46ad40789c013ad4e8dca2634aecaadd16ab85581fff7f9233289bc3e4c4655995b153af19c71c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}