def extract_data(self, page):
        """Extract the AppNexus object or list of objects from the response"""
        response_keys = set(page.keys())
        uncommon_keys = response_keys - self.common_keys

        for possible_data_key in uncommon_keys:
            element = page[possible_data_key]
            if isinstance(element, dict):
                return [self.representation(self.client, self.service_name,
                                            element)]
            if isinstance(element, list):
                return [self.representation(self.client, self.service_name, x)
                        for x in element]
Extract the AppNexus object or list of objects from the response