curl --request DELETE \
  --url https://api.quentli.com/v1/subscriptions/{id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "input": {
    "customCancelReason": "<string>"
  }
}
'

{
  "subscription": {
    "id": "sub_1234567890abcdefghij",
    "createdAt": "2025-01-01T06:00:00.000Z",
    "updatedAt": "2025-01-01T06:00:00.000Z",
    "customerId": "cus_1234567890abcdefghij",
    "collectionMethod": "AUTOMATIC",
    "firstCollectionDate": "2025-01-01T06:00:00.000Z",
    "generationMode": "AUTO",
    "onlyAutomaticCollection": false,
    "isActive": true,
    "isCompleted": false,
    "description": "Colegiatura mensual",
    "status": "ACTIVE",
    "paymentMethodId": "pm_1234567890abcdefghij",
    "taxProfileId": null,
    "nextCollectionDate": "2025-02-01T06:00:00.000Z",
    "lastCollectionDate": "2025-12-01T06:00:00.000Z",
    "metadata": {
      "Nivel": "Preparatoria"
    },
    "customCancelReason": null,
    "canceledAt": null,
    "canceledById": null
  }
}