I am trying to add a pdf file to the file cabinet, my restlet is receiving a base64 pdf string ie: data:application/pdf;base64,JVBERi0xLjUNJeLjz9MNCjE4IDAgb2JqDTw8 etc.. how can I upload this?

Have you tried using

N/file

and using

file.create

? Set name, fileType, contents, and folder. optionally isOnline