Api Example for Creating Payments

Since nothing about the API is documented, could you please provide an example on how to create a payment entry with f.i. Postman?

I've tried to access: /api/payments with this json body:

{
    "paid_at": "2018-12-09",
    "currency_code": "EUR",
    "currency_rate": 1,
    "amount": 123,
    "account_id": 2,
    "recurring_frequency": "no",
    "recurring_interval": 1,
    "recurring_custom_frequency": "monthly",
    "recurring_count": 0,
    "payment_method": "offlinepayment.cash.1"
}

But no matter how I change the request, I keep getting this error message:

"message": "The given data failed to pass validation.",
"status_code": 500

Thank you.

Pass post data as 'form-data' not a 'x-www-form-urlencoded'. I have face same issue and its solve. Also check in database beacuse API response blank.