curl --request POST \
  --url 'https://api.stateset.com/api/v1/ar/payment-applications' \
  --header "Authorization: Bearer $STATESET_API_KEY" \
  --header 'Content-Type: application/json' \
  --data '{
  "applications": [
    {
      "amount": "49.00",
      "invoice_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6"
    }
  ],
  "payment_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6"
}'

{
  "applications": [
    {
      "applied_amount": "49.00",
      "applied_date": "2026-08-31T14:22:05Z",
      "id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
      "invoice_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
      "payment_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6"
    }
  ],
  "total": 102
}