curl --request POST \
  --url 'https://api.stateset.com/api/v1/ar/write-offs/{id}/reverse' \
  --header "Authorization: Bearer $STATESET_API_KEY"

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