shopify_api/test/fixtures/usage_charge.json

{
  "usage_charge": {
    "id": 359376002,
    "description": "1000 emails",
    "price": "9.00",
    "recurring_application_charge_id": 654381177,
    "billing_on": "2015-07-08",
    "balance_remaining": "91.00",
    "balance_used": "9.00"
  }
}