Use csv to move content into Document Sets

Has anyone ever tried to use a csv file to move items in a document library into various document sets?  Currently all items are at the top level and I have a business need to move them into document sets.  I need to retain the original document metadata (i.e. created by, creation date, etc.) so just dragging and dropping isn't an option.  Just looking for the csv file syntax needed to have the items inserted into the appropriate document set. Current attempts of just preceding the file name with the name of the doc set, just results in the creation of a folder within the doc set.

Any suggestions would be appreciated.