FactuurBetaling::postSave
=========================


.. code-block:: json

   {
     "version": "0.1",
      "data": {
        "id": 8801,
        "factuur_id": 701,
        "wanneer": "2025-08-18T12:15:00+00:00",
        "bedrag": "50.00",
        "opmerking": "Aanbetaling contant",
        "betaalmethode_id": 5,
        "mollie_transaction_id": null,
        "pos_id": 5,
        "location_id": 12,
        "created_by": 12
      },
     "meta": {}
   }

Explanation:

- **id**: integer.
- **factuur_id**: integer|null.
- **wanneer**: non-empty-string. ISO 8601 datetime when the payment was registered.
- **bedrag**: numeric-string|null. Decimal with dot as separator, 2 fraction digits (e.g. `"123.45"`).
- **opmerking**: string|null.
- **betaalmethode_id**: integer|null. References a payment method.
- **mollie_transaction_id**: string|null. Unique Mollie transaction id if present.
- **pos_id**: integer|null. Point-of-sale (`kassa`) id if created via POS.
- **location_id**: integer|null. Location id of POS.
- **created_by**: integer|null. User id who created the payment.

Webhook selection: use `FactuurBetaling::postInsert` for creations and `FactuurBetaling::postUpdate` for updates.