Constructor: updatePinnedForumTopic
Attributes:
Type: Update
Example:
$updatePinnedForumTopic = ['_' => 'updatePinnedForumTopic', 'pinned' => Bool, 'peer' => long, 'topic_id' => int];
$updatePinnedForumTopic = ['_' => 'updatePinnedForumTopic', 'pinned' => Bool, 'peer' => long, 'topic_id' => int];