#!/usr/bin/perl -w
use strict;
use warnings;
use Data::Dumper;
use SOAP::Lite;
my %data_to_send_in_soap_map = (
  'country' => 'NL',
  'step' => '1',
);

my (@soap_map,@params);
foreach my $key (keys %data_to_send_in_soap_map) {
  push @soap_map,
    \SOAP::Data->name('item')->value([
      SOAP::Data->name('key')->value($key),
      SOAP::Data->name('value')->value($data_to_send_in_soap_map{$key})
    ]);
}

@params = (
  SOAP::Data->name('params')->type('ns2:Map')->value(\@soap_map)
);

print Dumper (\@params);