Log operations "save results" in BigQuery

[SergeyN]

Good afternoon, inside the company we want to log the click of the "Save Results" button from the browser UI to BigQuery ("CSV*", "JSON", "Copy to Clipboard", etc.). This is necessary to build a leak control process.

The problem is that when analyzing the logs of the "Logging" service (for example, using Logs Explorer or Splunk), no difference was found between the usual "SELECT" and "SAVE RESULTS".

The difference was found only when proxying browser requests through a proxy server, there is a "downloadFormat" field among the parameters.

How to log it using "Logging (stackdriver)" service?