Preparing Splunk

To use Splunk, you need to set up HTTP Event Collector (HEC).

Open Splunk.
Go to Settings > Data inputs.
Select HTTP Event Collector.
Select the green New Token button from the top-right corner.
Fill in the Name field with a name for your HEC.
Select Next.
Select the index you want to ingest data into. In the example screenshot main is selected. You can customize your choice in this page.
Select Review.
Select Submit.