OptionallikedOptionalimagesPictures attached to the comment, up to 3 (url full size, mediumUrl / thumbUrl smaller; absent on older servers). Public for public posts: use them in <img src>.
OptionalstickerA sticker comment (absent on older servers). url / thumbUrl load in <img> for public packs; otherwise use api.media(url).
The author of the post liked this comment (the apps show their picture with a heart). On comment lists; absent on older servers.