@homebridge/dbus-native/lib/header-signature.json

D-bus protocol implementation in native javascript

[
    {
        "type": "a",
        "child": [
            {
                "type": "(",
                "child": [
                    {
                        "type": "y",
                        "child": []
                    },
                    {
                        "type": "v",
                        "child": []
                    }
                ]
            }
        ]
    }
]