#!perl
use strict;
use warnings;

use HTTP::Tiny;

my $ua  = HTTP::Tiny->new();
my $res = $ua->request(
    'POST' => 'https://my.webpage.com/my/path',
    {
        headers => {
            'Content-Length' => '15',
            'User-Agent'     => 'curl/7.55.1',
            'My-Header-2'    => 'beta',
            'My-Header'      => 'alfa',
            'Content-Type'   => 'application/x-www-form-urlencoded',
            'Accept'         => '*/*'
        },
        content => "here is my data"
    },
);



__END__

Created from curl command line
curl -kv -X POST
    "https://my.webpage.com/my/path"
    --header 'My-Header: alfa'
    --header 'My-Header-2: beta'
    --data-raw 'here is my data'