def update(self, data):
        """ Update a list."""
        self.debug(data)
        url = "%(base)s/%(list_uuid)s/contacts/%(uuid)s" % {
            'base': self.local_base_url,
            'list_uuid': data.get('mailingListUuid'),
            'uuid': data.get('uuid')
        }
        return self.core.update(url, data)