curl --request GET \
  --url https://production.trackstarhq.com/wms/billing/{bill_id} \
  --header 'x-trackstar-access-token: <x-trackstar-access-token>' \
  --header 'x-trackstar-api-key: <x-trackstar-api-key>'

{
  "data": {
    "id": "bill_id_1",
    "warehouse_customer_id": "warehouse_customer_id",
    "created_date": "2022-01-01T00:00:00Z",
    "updated_date": "2022-01-02T05:05:05Z",
    "object_id": "object_id",
    "object_type": "order",
    "charge_type": "shipping",
    "amount": 10.5,
    "currency_code": "USD",
    "additional_fields": {
      "key": "value"
    }
  }
}