curl -X POST 'https://api.goatpay.com.br/v1/subaccount/update' \
  -H 'X-API-Key: gp_live_SUA_CHAVE' \
  -H 'Content-Type: application/json' \
  -d '{ "id": "clx_subconta", "name": "Loja A — filial" }'

{
  "success": true,
  "message": "Subconta atualizada",
  "data": {
    "id": "clx_subconta",
    "name": "Loja A — filial",
    "externalReference": "loja-parceiro-a",
    "status": "ACTIVE",
    "lockMode": "NONE"
  },
  "requestId": "req_abc123"
}