Optional ReadonlycarouselThe carousel's children from the grid answer; absent on a media that is no carousel.
ReadonlymediaReadonlypositionReadonlystartingThe starting_clips_media_id the item's like carries: the pk of the clip
the contextual feed was entered from, the feed's own fact
(host.facts.firstMediaId). The app carries the field on the button
like of the entered item itself, where the entry clip and the liked item
are one media, so choosing the entry clip for a later item rests on the
field's name, not on the app's behavior; the double-tap like carries no
such field and is not modelled.
Optional ReadonlytrackingThe grid answer's organic_tracking_token on the media: the repost note's tracking_token.
What acting on one item needs: the media it addresses, its feed position, the grid answer's token and the feed's entry clip.