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    var params=<?=\Bitrix\Main\Web\Json::encode(['signedParameters'=>$this->getComponent()->getSignedParameters()])?>;

    var query = {
        c: 'component:order',
        action: 'test',
        mode: 'class',
        signedParameters: params.signedParameters
    };

    $.ajax({
        url: '/bitrix/services/main/ajax.php?' + $.param(query),
        method: 'POST',
        data: data
    }, function(response){
        console.log(response);
    })

<?
if (!defined("B_PROLOG_INCLUDED") || B_PROLOG_INCLUDED !== true) die();
 
use \Bitrix\Main\Loader,
    \Bitrix\Main\Engine\Controller;
 
class AjaxController extends Controller {

    protected function listKeysSignedParameters() {
        return [
            'IBLOCK_ID', 'CART_PROPS'
        ];
    }

    public function configureActions()
    {
        return [
            'test' => [
                'prefilters' => []
            ]
        ];
    }

    public function onPrepareComponentParams($arParams) {
        return $arParams;
    }


    public function testAction() {
        return [
            'params' => $this->getUnsignedParameters();
        ];
    }
}

?>