How do I access AJAX data within a controller method?
Any properties of the object you pass into Craft.postActionRequest()’s second argument will be available to Craft as POST parameters, so you can get to them with HttpRequestService::getPost():

$sData = craft()-&gt;request-&gt;getPost('Data');

foreach ($sData as $temp)
{
    $wine = $temp['wine'];
    // ...
}