curl --request POST \
  --url https://api.example.com/v1/billing/invoices/ \
  --header 'Content-Type: application/json' \
  --data '
{
  "items": [
    {
      "type": "staff",
      "count": 123,
      "id": 123,
      "integration_period": 123
    }
  ],
  "success_url": "<string>"
}
'

{
  "id": 123,
  "tenant": 123,
  "card": 123,
  "currency": "KZT",
  "status": "waiting",
  "total": "<string>",
  "captured_amount": "<string>",
  "refund_amount": "<string>",
  "captured_at": "2023-11-07T05:31:56Z",
  "start_at": "2023-11-07T05:31:56Z",
  "end_at": "2023-11-07T05:31:56Z",
  "items": [
    {
      "type": "staff",
      "count": 123,
      "price": "<string>",
      "id": 123,
      "integration_period": 123
    }
  ],
  "transaction_url": "<string>"
}