{
  "uid": "d284fb3c-5c29-e316-ed71-8ce7852f8e50", //required, any unique string that tracks the user currently browsing
  "parentURL": "https://referral-url.com", //optional but recommended, the URL on which the user loaded the widget
  "API_KEY": "abcdefg", //required, the Pixlee ACCOUNT PRIVATE API KEY
  "cart_contents": [
    {
        'price': '13.00',
        'product_sku': 'SL-BENJ',
        'quantity': 1
    },
    {
        'price': '5.00',
        'product_sku': 'AD-1324S',
        'quantity': 2
    }], //required, a list of objects containing sku, price and quantity information
  "currency": "USD", //required, the currency of the cart
  'order_id': "234232", //optional but highly recommended, an id representing the internal order number
'cart_total_quantity': 3, //required, total items bought in the cart
'cart_total': '18.00' //required, sum of the prices of the cart
}