Reply to a mention

Reply to a mention of the connected account. Supported on Instagram only.

Two shapes, selected by whether commentId is present:

• Comment mention (someone @mentioned the account inside a comment): pass both mediaId and commentId. Instagram posts a reply under that comment.
• Caption mention (someone @mentioned the account in their media caption, so no comment exists): pass mediaId only. Instagram posts a comment on their media.

Story mentions are not supported by Instagram's API.

Note that GET /v1/inbox/mentions currently returns LinkedIn mentions only and does not surface Instagram mentions. Source mediaId and commentId from Instagram's comments webhook, which is where mention notifications are delivered for accounts connected through Instagram Login.