Paypal shopping cart custom create order objects and user details

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Javascript

PHP

PayPal

I have a shopping cart that holds an array or my objects. I have all my customer user details serialized with a form and jQuery. I would like to insert the user data I got from my user details form (maybe I use payer or payer_info? Object. Also I would like to insert my items to the paypal

CreateOrder:        actions.order.create({

I am guessing I do it like this?

"item_list": {
"items": [
{
"name": "hat",
"description": "Brown color hat",
"quantity": "5",
"price": "3",
"tax": "0.01",
"sku": "1",
"currency": "USD"
},
{
"name": "handbag",
"description": "Black color hand bag",
"quantity": "1",

OR maybe in

"data": {

and I can have my own custom objects for the paypal order class. Could any one give me an example or more input on how I will do this. In the developer.paypal.com/docs I been reading pretty much all the different project SDKs for javascript / php I would like to use my javascript to insert the information

This is what I have

$fname = $_POST['txtFirstname'];
    $lname = $_POST['txtLastname'];
    $email = $_POST['txtEmail'];
var totalPrice = <?php echo $newTotal; ?>

paypal.Buttons({
    createOrder: function(data, actions) {
        // setup transaction
        return actions.order.create({
            payer: {
                name:
            },
            purchase_units: [{
               amount: {
                   value: totalPrice
               } 
            }]
        });
    },

What I have tried:

I have tried multiple different ways to insert my items into the create order. I been reading the paypal development docs and i just need a little bit more just a reference for 1 custom item and to insert the user details from my custom variables and ill have it