To create a reply to a previous comment, call the API with the message of the new comment, as well as the ID of the previous comment to leave the reply on. A reply’s message can also mentions users using theDocumentation Index
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@ sign. To do so, add
the string @[userid:name] anywhere within the message. The user_id is the
target user’s ID, where the name can be any custom phrase. In the Box UI this
name will link to the user’s profile.
Then, pass this string as the tagged_message instead of the message.