curl -X POST 'https://api.wovepay.com/v1/subscriptions/cancel/sub_abc123' \
  -H 'X-API-Key: wp_live_SUA_CHAVE'

{
  "success": true,
  "message": "Assinatura cancelada",
  "data": {
    "subscriptionId": "sub_abc123",
    "externalId": "sub_ext_xyz",
    "status": "CANCELED",
    "method": "BOLETO",
    "amount": 99.9,
    "cycle": "MONTHLY",
    "description": "Plano Premium",
    "nextDueDate": "2026-08-01",
    "createdAt": "2026-07-01T12:00:00.000Z",
    "customer": {
      "id": "12345678909",
      "name": "Maria Silva",
      "taxId": "12345678909"
    }
  },
  "requestId": "req_abc123"
}