my $uri = "http://service/uri" ;
my $proxy = "https://service.provider.address/Service/service.asmx?WSDL" ;

my $service = SOAP::Lite
                 ->uri($uri)
                 ->proxy($proxy)
                 ->autotype(0)
                 ->outputxml(1)
                 ->on_action( sub { join '/', @_ } ) ;

my $response = $service->MethodName(
                 SOAP::Header
                     ->name( 'AuthHeader' )
                     ->value( {   header1 => $header_1,
                                  header2 => $header_2 } ),
                 SOAP::Data
                     ->name( 'NamedParam1' )
                     ->type( 'string' )
                     ->value( $named_param_1 ),
                 SOAP::Data
                     ->name( 'NamedParam2' )
                     ->type( 'string' )
                     ->value( $named_param_2 )
) ;

print "RESPONSE: $response\n" ;