Figured it out!
I’m now using Zapier to flatten the nested JSON fields. The workflow now looks like EventBrite (webhook) → Zapier (webhook and mini-etl) → Bubble (API endpoint)
Here’s some screenshots on how it works in Zapier.
The zap specifies the fields that will be received by the Bubble Endpoint. Now you have a Zap.
Set up Bubble Endpoint
That’s it.