{
  "manageEntity": {
    "action": "Save",
    "entityId": "424648332",
    "entityType": "Track",
    "nonce": "0x95a816eee65148c65feb090860bb9ec6f61b4a48d548143a50796c87fe3c85c4",
    "signature": "0x2b4282b8f4b30b9dbe6c369adae123ce524862dec4ba49567ea3442094d7d25d3634130a9c0c4a3ec5eb58513e73c54675424de70b1e486ecd62738973e124e31b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}