public function addInterestGroupings($name, $type, array $groups)
    {

        $payload = array(
            'id' => $this->listId,
            'name' => $name,
            'type' => $type,
            'groups' => $groups
        );

        $apiCall = 'lists/interest-grouping-add';
        $data = $this->requestMonkey($apiCall, $payload);
        $data = json_decode($data, true);
        if (isset($data['error']))
            throw new MailchimpAPIException($data);
        else
            return isset($data) ? $data : false;
    }