Something like

my $soap ... 
->proxy( 'http://localhost/blah/DummyService', timeout => 1 );
$soap->transport->add_handler("request_send",  sub {
  my( $req ) = @_;
  use autodie;
  open my $raw, ">', '/my/known/temp.gz';
  binmode $raw;
  print $raw $req->content;
  close $raw;
  return;
});
[download]

I get the desired result if i dont use options=>{compress_threshold =>1000} in the client.

Let me understand, eliminating compress_threshold fixes it? Yeah, I'd remove that immediately :)

I'd also look into SOAP::Simple