IFTTT integration issues

I am trying to follow this integration:

I have the IFTTT side setup
Tested the webhook and it works when sending it from HA to IFTTT
I am now trying to work on the return from IFTTT to HA

According to doc, it says to create an automation like so

But when I try to enter that into a new automation through YAML, I get this malformed error

Hi, probably you already fixed your problem,
but here is my working code example:

- alias: Test
  - platform: event
    event_type: ifttt_webhook_received
      action: call_service
  - data:
      entity_id: '{{ trigger.event.data.entity_id }}'
    service: '{{ trigger.event.data.service }}'

If this is not working, I would expect that something in IFTTT is configurated wrong. You should post the configuration of the “that” reaction…
First of all, I would expect sth. is wrong with the URL