public function updateBatchTags(
        $batchId, array $tagsToAdd, array $tagsToRemove
    ) {
        $json = Serialize::tagsUpdate($tagsToAdd, $tagsToRemove);
        $result = $this->_post($this->_batchUrl($batchId, '/tags'), $json);
        return Deserialize::tags($result);
    }