curl --request POST \
  --url 'https://api.stateset.com/api/v1/ar/write-offs' \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
  "amount": "string",
  "approved_by": null,
  "invoice_id": "string",
  "notes": null,
  "reason": "string"
}'

{
  "amount": "string",
  "created_at": "string",
  "customer_id": "string",
  "id": "string",
  "invoice_id": "string",
  "reason": "string",
  "reversed": true,
  "write_off_number": "string"
}