Yes - in the list of packages, right-click and say "Follow TCP Stream". For uncompressed content, that is it.
If the content is gzipped, you need to save this output to a file, use a decent text editor (which will not break binary content) to remove the headers, and then run gunzip to unpack it.
( - , Wireshark , !)
: "chunked-encoding"..., . , , .