No description on approve page when I use the PayPal REST API - api

Question

Using the PayPal REST API, I'm passing in this to new payments:
URL: https://api.paypal.com/v1/payments/payment
Request:
{
"intent":"sale",
"payer":{
"payment_method":"paypal"
},
"redirect_urls":{
"return_url":"[return_path]",
"cancel_url":"[cancel_path]"
},
"transactions":[
{
"amount":{
"total":"19.95",
"currency":"USD",
"details":{
"subtotal":"19.95"
}
},
"description":"[product description]"
}
]
}
But on the PayPal approve page I see no any order info. In "Your order summary" section at the left I see no description, no total, no subtotal, nothing.
Screenshot: http://goo.gl/dxoicB
But I expect to see there at lest smth...
How can I make individual items with descriptions in the REST API checkout? Or what I'm doing wrong? It seems I've read the whole Developers Guide, but there is nothing about it.
And another thing: when I done with order, in transaction details also is no any technical info about order.
Screenshot: http://goo.gl/i4iGHZ
There is no technical information allows us to understand what site and what product was sold there.

Answer 1

You have to specify the item_list on transactions to get order summary.
Example request data
{
"intent": "sale",
"payer": {
"payment_method": "paypal"
},
"redirect_urls": {
"return_url": "http://return.url",
"cancel_url": "http://cancel.url"
},
"transactions": [{
"item_list": {
"items": [{
"name": "item",
"sku": "item",
"price": "1.00",
"currency": "USD",
"quantity": 1
}]
},
"amount": {
"currency": "USD",
"total": "1.00"
},
"description": "This is the payment description."
}]
}
Refer:
https://developer.paypal.com/webapps/developer/docs/api/#transaction-object
https://github.com/paypal/rest-api-sdk-nodejs/blob/master/samples/payment/create_with_paypal.js#L16