如何从ajax中获取laravel中的请求

I'm trying to send multiple data to store more tha 1 row in a data base in Laravel, for that I'm using ajax as follow:

var postData = [];

for (i = 0 ; i<100; i++){             
    postData.push({form_name: name[i], etc...});
}

$.ajax({
    async: false,
    url: {{route(createForm)}},
    headers: {"X-CSRF-TOKEN": token},
    type: 'POST',
    contentType: 'application/json',
    dataType: 'json',
    data: JSON.stringify(postData),
}); 

When I check de console the data it's being send pretty good but I don't have any clue in how to fetch the request in the controller, when it is just a single request the controller works perfect like this:

public function createForm(Request $data, User $user)
{
    if ($data->ajax()){
        $form=new Form($data->all());
        $user->forms()->save($form); 
    }
} 

But as I said, I don't know if the request is now an array or how can I handle it to store all the data in the DB with a loop

Thanks a lot.

public function createForm(Request $data, User $user)
{
    foreach( $data->all() as $row) {
        $form = new Form($row);
        $user->forms()->save($form); 
    }
}