butt.js

{
  "product" : {
    "id" : 1,
    "image_url" : "whatever.com"
  },
  "color" : {
    "id" : 1,
    "name" : "White"
  }
  "campaign_name" : "whatever",
  "size" : "whatever", 
  "price" : "whatever", // this should probably be a Money object
  "quantity" : 10,
  "token" : "gimme" // campaign root token
}

// How the order request is formatted

{
  "line_items" : [
    {
      "style"    : productID + "-" + colorID,
      "size"     : "M",
      "quantity" : 10
    }
  ]
}