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

{
  "amount": "49.00",
  "applied_amount": "49.00",
  "created_at": "2026-08-31T14:22:05Z",
  "credit_memo_number": "string",
  "customer_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "reason": "Two-person tent, green — replacement for damaged pole set.",
  "status": "pending",
  "unapplied_amount": "49.00"
}