The added sticker. Pass a file_id as a String to send a file that already exists on the Telegram servers, pass an HTTP URL as a String for Telegram to get a file from the Internet, or upload a new one using multipart/form-data. Animated and video stickers can't be uploaded via HTTP URL.

Format of the added sticker, must be one of “static” for a .WEBP or .PNG image, “animated” for a .TGS animation, “video” for a WEBM video

List of 1-20 emoji associated with the sticker

Position where the mask should be placed on faces. For “mask” stickers only.

List of 0-20 search keywords for the sticker with total length of up to 64 characters. For “regular” and “custom_emoji” stickers only.