Example response:

{
  "data": {
    "id": 1,
    "name": "Standard",
    "countries": [
      "US"
    ],
    "shipping_rates": [
      {
        "shipping_rate": {
          "shipping_group_id": 1,
          "first_item_in_cents": 450,
          "additional_item_in_cents": 150
        }
      }
    ]
  },
  "meta": {
    "code": 200,
    "api_version": "1.0"
  }
}