How can I use the token field from a cart info?

[Zolbayar]

When I use `GET /cart.js` from the AJAX API , it returns something like this: 

{
  "token": "1d19a32178501c44ef2223d73c54d16d",
  "note": "Hello!",
  "attributes": {
    "Gift wrap": "Yes"
  },
  "total_price": 9100,
  "total_weight": 0,
  "item_count": 3,
  ...
}

I wonder if there's a way to use the `token` field anywhere else  (like verifying the cart content through another API, etc)