{
"id": 1340404,
"title": "Title of what you are paying for. It will be displayed in the payment process.",
"description": "Item description",
"category_id": "art",
"picture_url": "https://www.mercadopago.com/org-img/MP3/home/logomp3.gif",
"currency_id": "ARS",
"quantity": 1,
"unit_price": 100
}