function getContactsByFilterId($filterId, $page_index = 1, $page_size = 100, $standard_fields = array(), $custom_fields = array())
    {
        $queryParameters = array(
            'page_index' => $page_index,
            'page_size' => $page_size,
            'standard_field' => $standard_fields
        );
        $queryParameters = $this->appendArrayFields($queryParameters, 'custom_field', $custom_fields);
        return $this->get('contacts/filter/' . utf8_encode($filterId), $queryParameters);
    }