def METHOD_NAME(obj):
    if isinstance(obj, dict):
        for key in obj:
            value = obj[key]
            if key in self._keys:
                obj[key] = self._replacement
            elif key == "iceServers":
                METHOD_NAME(value[0])
            elif key == "urls":
                obj[key][0] = "turn.skype.com"
            else:
                METHOD_NAME(value)
    elif isinstance(obj, list):
        for i in obj:
            METHOD_NAME(i)