https://www.paypal.com/webapps/mch/cmd/?v=3.0&t=$UNIX&fdata=$STUFF

[Scripter17]

• fdata seems to be a list of base64 streams ("segments") delimited by ..
• The example I have (from a "you sent a payment" receipt email) redirects to https://www.paypal.com/cgp/mgm/referrer?intent=mktg&tsrce=txn.
• It seems the first segment is about 4/3x the length of the final URL but base64 decoding with start-truncating 0-3 characters doesn't seem to work.
• The fifth segment is also about 4/3x the length of the final URL but again I've yet to find any way to decode it.
• The second segment is very large and may contain the answer?