my $url = "https://dysmsapi.aliyuncs.com";
my $params = [ RegionId => '1', PhoneNumbers => '4324234', SignName => 'fghgfhg', 
             TemplateCode => 'fghgfh', api_version  => '2018-04-08' ];
my $uri = URI->new();
$uri->query_form(@$params);
$urlparam = $uri->as_string;

my $req = HTTP::Request->new(POST=>$url);
$req->header('Content-Type' => 'application/json; charset=UTF-8');
$req->header('access_key_id'     => 'sdsadasd');
$req->header('access_key_secret' => 'asdasdsa');