curl -X POST "https://api.nevatal.com/api/v1/billing/payments" \
  -H "Authorization: Bearer nvtl_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "invoiceId": "inv_001",
    "amount": 178500,
    "method": "transfer",
    "reference": "BANK-REF-12345"
  }'

{
  "id": "pay_002",
  "invoiceId": "inv_001",
  "amount": 178500,
  "currency": "COP",
  "method": "transfer",
  "status": "completed",
  "reference": "BANK-REF-12345",
  "paidAt": "2025-03-16T14:00:00Z"
}

{
  "statusCode": 422,
  "error": "Unprocessable Entity",
  "message": "Payment amount exceeds invoice balance"
}