We have a business requirement where by the arrival of a document in a knowledge

We have a business requirement where by the arrival of a document in a knowledge center need to trigger an Appian process. Is there any listeners in Appian that we can attach to this file arriving event. The files are getting upload to Appian, using the Knowledge center browser channel on a Appian portal page. So our requirement is to trigger a process when a portal user uploads a document directly to a KC folder using the knowledge center browsing channel.
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OriginalPostID-108792

OriginalPostID-108792