How to send datadog the content of a JavaScript event through RUM

Question

I am only starting on DataDog, and what I want to accomplish is adding a few data to the events that DD_RUM collects. More specifically, I would like to sent to datadog the entire event object of any user triggered action from a React application. I had a look on beforeSend (I wasn't able to add the event to the payload). And I am aware that there is an addAction api to send to DataDog custom actions, but I am looking for a solution that would work for any action.

My current DD configs on the react application:

  datadogRum.init({
    applicationId: 'my-app-id',
    clientToken: 'my-token',
    site: 'datadoghq.eu',
    service:'react-datadog-poc',
    env:'dev',
    version: '1.0.0',
    sessionSampleRate: 100,
    sessionReplaySampleRate: 100,
    trackUserInteractions: true,
    forwardErrorsToLogs: true,
    trackFrustrations: true,
    trackResources: true,
    trackLongTasks: true,
    defaultPrivacyLevel:'allow'
  });
  
  datadogLogs.init({
      clientToken: 'my-token',
      site: 'datadoghq.eu',
      forwardErrorsToLogs: true,
      forwardConsoleLogs: "all",
      forwardReports: "all",
        sessionSampleRate: 100
  });
  datadogRum.startSessionReplayRecording();