curl --request GET \
  --url https://app.textql.com/v2/sandcastles/{id} \
  --header 'Authorization: Bearer <token>'

{
  "memory_usage": "<string>",
  "dataframes": [
    {
      "name": "<string>",
      "num_rows": 123,
      "num_cols": 123,
      "memory_usage_bytes": 123
    }
  ]
}