Difficulty sending webhook message from IFTTT to HA

Not sure why, but my IFTTT Applet is not being received by HA. The Applet properly fires on IFTTT side. Here’s what I have…

  1. IFTTT set as an Integration

  2. I have connected two IFTTT accounts to HA via the following in my configuration.yaml file…

ifttt:
  key:
    key1: cXJ...
    key2: oHp...
  1. I have the following generic Automation setup in my automations.yaml file…
- id: '1234567890'
  alias: IFTTT - webhook handler
  trigger:
  - platform: event
    event_type: ifttt_webhook_received
    event_data:
      action: call_service
  action:
  - service: '{{ trigger.event.data.service }}'
    target:
      entity_id: '{{ trigger.event.data.entity_id }}'
  1. Here’s the execution part of my IFTTT Applet…

URL: https://XXXXX.duckdns.org:9123/api/webhook/oHp
Method: Post
Content Type: application/json
Body: { “action”: “call_service”, “service”: “light.turn_on”, “entity_id”: “light.office_desk_lamp” }

What is wrong with this? Why might it not be receiving?