curl --request POST \
  --url https://api.sprucecollective.co.uk/nomupay/create-order \
  --header 'Content-Type: application/json' \
  --data '
{
  "amount": 123,
  "brands": [
    "<string>"
  ],
  "cancel_url": "<string>",
  "completed_at": "<string>",
  "confirmation_only": true,
  "created_at": "<string>",
  "currency": "<string>",
  "custom_data": {},
  "customer_email": "<string>",
  "customer_name": "<string>",
  "customer_phone": "<string>",
  "description": "<string>",
  "entity_id": "<string>",
  "failure_url": "<string>",
  "integrity": true,
  "item_id": "<string>",
  "metadata": {},
  "order_id": "<string>",
  "payment_brand": "<string>",
  "payment_id": "<string>",
  "payment_type": "<string>",
  "quantity": 123,
  "redirect_url": "<string>",
  "result_code": "<string>",
  "site_id": "<string>",
  "status": "<string>",
  "success_url": "<string>",
  "upsells": [
    {
      "discount": 123,
      "percentage": 123,
      "qty": 123,
      "quantity": 123
    }
  ],
  "user_exists": true,
  "user_id": "<string>",
  "utm": "<string>",
  "utm_campaign": "<string>",
  "utm_content": "<string>",
  "utm_medium": "<string>",
  "utm_params": {},
  "utm_source": "<string>",
  "utm_term": "<string>"
}
'

{
  "checkout_id": "<string>",
  "environment": "<string>",
  "error": "<string>",
  "error_code": "<string>",
  "integrity": "<string>",
  "message": "<string>",
  "order_id": "<string>",
  "order_state": "<string>",
  "payment_id": "<string>",
  "status": "<string>",
  "success": true
}