OptionalaudienceOptionalcarouselZero-based carousel child index. Absent takes the build's default: -1 on
the 451 shape (the media has no carousel child in the 451 app) and
0 on the 450 shape (its carousel note names the first child).
OptionalcarouselCarousel child id the note is attached to, <carouselPk>_<authorPk>. Sourced
from the media info response (carousel_media_ids[index] + the author pk).
The 450 shape falls back to the container id when absent; the 451 shape
omits carousel_media_id entirely (every 451 note records none).
OptionalinventoryFeed inventory source: the caller's, or the feed like's own (FEED_LIKE_INVENTORY_SOURCE) when none is declared. The 450 shape always sends it; the 451 shape never does.
OptionalmediaThe acted-on media's position in the feed; defaults to 0.
Container media id (<pk>_<authorPk>), as returned by the media info response.
OptionalrankingFeed logging token for the acted-on item, carried on the feed response,
sent as ranking_info_token. The 450 shape always sends the field (empty
when absent); the 451 shape never sends it.
OptionaltextOptional note text: a 'note-with-text' build sends it in this request; an 'editor' build leaves the note blank and sets it afterwards.
organic_tracking_token of the media info response.
Note audience; defaults to NOTE_AUDIENCE_DEFAULT.