Identifier of the chat.
Optional
edit_Pass true to edit the icon of the topic. Icon of the General topic can't be edited.
Identifier of the new custom emoji for topic icon; pass 0 to remove the custom emoji. Ignored if edit_icon_custom_emoji is false. Telegram Premium users can use any custom emoji, other users can use only a custom emoji returned by getForumTopicDefaultIcons.
Message thread identifier of the forum topic.
New name of the topic; 0-128 characters. If empty, the previous topic name is kept.
Edits title and icon of a topic in a forum supergroup chat; requires can_manage_topics right in the supergroup unless the user is creator of the topic. Request type for Tdjson#editForumTopic.