Yii2 Pjax and GridView - refresh is not working properly - yii

Question

I am using the Pjax and GridView, and trying to make it work properly after the status of the item is changed. Currently, after the action is over, and server sends back the result, the whole GridView will be replaced with the text (response from the controller).
The Pjax code:
<?php
Pjax::begin(['id' => 'product-manage']);
echo GridView::widget([
'dataProvider' => $productsProvider,
'filterModel' => $filterModel,
'filterPosition' => 'header',
'columns' => [
['class' => 'yii\grid\SerialColumn'],
....
['class' => 'yii\grid\ActionColumn',
'header' => 'Actions',
'buttons' => [
....
'toggle-publish' => function ($url, $model) {
$html = $model->published ? '<span class="glyphicon glyphicon-remove"></span>' : '<span class="glyphicon glyphicon-ok"></span>';
return Html::a($html, $url, [
'title' => $model->published ? 'Unpublish' : 'Publish',
'data-pjax' => 'product-manage',
'data' => [
'confirm' => $model->published ? 'Are you sure you want to unpublish ' . $model->inci . ' ?' : 'Are you sure you want to publish ' . $model->inci . ' ?',
'method' => 'post',
],
]);
},
],
'template' => '<span class="block text-center">{view}</span>
<span class="block text-center">{update}</span>
<span class="block text-center">{toggle-default-product}</span>
<span class="block text-center">{toggle-publish}</span>'
],
],
]);
Pjax::end();
?>
Controller:
$response = Yii::$app->response;
$response->format = \yii\web\Response::FORMAT_JSON;
$response->statusCode = 200;
$response->data = Yii::$app->controller->renderPartial('/partials/_alerts', [
'message' => $message,
'type' => 'success'
]);
return $response;
What am I doing wrong here?