CKO Sessions

                  {
  "source": {
    "type": "card",
    "number": "4242424242424242",
    "expiry_month": 12,
    "expiry_year": 2099
  },
  "amount": 100,
  "currency": "USD",
  "authentication_type": "regular",
  "authentication_category": "payment",
  "challenge_indicator": "no_preference",
  "reference": "ORD-5023-4E89",
  "transaction_type": "goods_service",
  "shipping_address": {
    "address_line1": "123 Fake St",
    "city": "Mountain View",
    "state": "CA",
    "zip": "94040",
    "country": "US"
  },
  "completion": {
    "type": "non_hosted",
    "callback_url": "https://webhook.site/90323c95-e1fe-482e-a19a-629dd2162134"
  },
  "processing_channel_id" : "pc_j43mpzxl4q3epgibukaetyiwny"
}