curl -X POST https://api.wyzecash.com.br/v1/subaccounts/sacc_9f1c2d3e4a5b6c7d8e9f0a1b2c3d4e5f/return \
  -H "Authorization: Bearer bk_live_..." \
  -H "Idempotency-Key: acerto-2026-10-vendedor-42" \
  -H "Content-Type: application/json" \
  -d '{ "amount": 5000, "description": "Acerto de comissão" }'

{
  "id": "SUB-4Z3F7K9Q2W8M",
  "kind": "return",
  "kindTitle": "Devolvido à principal",
  "direction": "debit",
  "amount": 5000,
  "gross": null,
  "fee": 0,
  "description": "Acerto de comissão",
  "createdAt": "2026-10-08T15:30:00.000Z",
  "subaccount": { "id": "sacc_9f1c2d3e4a5b6c7d8e9f0a1b2c3d4e5f", "externalId": "vendedor-42", "balance": 9200 }
}