curl --request POST \
  --url https://app.textql.com/v2/sandboxes/{id}/query \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "connector_id": 123,
  "query": "<string>",
  "dataframe_name": "<string>"
}
'

{
  "preview": "<string>",
  "dataframe_name": "<string>",
  "num_rows": 123,
  "num_cols": 123
}