Emoji modifier fitzpatrick type; 0-6; 0 if none.
File containing the sound to be played when the sticker is clicked; may be null. The sound is encoded with the Opus codec, and stored inside an OGG container.
Sticker for the emoji; may be null if yet unknown for a custom emoji. If the sticker is a custom emoji, then it can have arbitrary format.
Expected height of the sticker, which can be used if the sticker is null.
Expected width of the sticker, which can be used if the sticker is null.
Describes an animated or custom representation of an emoji.