shopify_api/test/fixtures/usage_charges.json

{
  "usage_charges": [
    {
      "id": 359376005,
      "description": "1000 emails",
      "price": "9.00",
      "recurring_application_charge_id": 654381177,
      "billing_on": "2015-07-08",
      "balance_remaining": "82.00",
      "balance_used": "18.00"

    },
    {
      "id": 359376006,
      "description": "1000 emails",
      "price": "9.00",
      "recurring_application_charge_id": 654381177,
      "billing_on": "2015-07-08",
      "balance_remaining": "82.00",
      "balance_used": "18.00"
    }
  ]
}