curl --request POST \
  --url https://app.textql.com/v1/sandbox/query \
  --header 'Authorization: Bearer <token>' \
  --header 'Connect-Protocol-Version: <connect-protocol-version>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "sandboxId": "<string>",
  "connectorId": 123,
  "query": "<string>",
  "dataframeName": "<string>"
}
'

{
  "dataframeName": "<string>",
  "numRows": 123,
  "numCols": 123,
  "preview": "<string>"
}