I've never tried it before; however, this is untested, but I'm guessing that you'll need to use document/literal:

#!/usr/bin/perl

use strict;
use warnings;
use SOAP::Lite;

my $oCM = SOAP::Lite->service($url);
$oCM = SOAP::Data->encodingStyle(''),
my $oResult = $oCM->updateLine(
    SOAP::Data->name(destination => $url)
);
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