Converting a blueprint from ZHA to Hue Hub

I have taken a blueprint script to a HUE RW022 remote switch. What I am trying to do is make it work with my Hue Hub and not zha. I am getting an error I am not quite sure of:
Failed to load blueprint: mapping values are not allowed here in “/config/blueprints/automation/GregoryWest501/HueDimmer v2.1h.yaml”, line 56, column 15

This is on the line: event_data:

Any ideas would be helpful.

blueprint:
  name: Philips Hue Dimmer V2.1h
  description: "Control lights with a Philips Hue Dimmer Switch (v2).\n Blueprint
    Version: v2.0.01h"
  domain: automation
  input:
    remote:
      name: Philips Hue Dimmer Switch
      description: Pick a RWL022 Dimmer Switch
      selector:
        device:
          integration: hue
          entity:
          - domain:
            - sensor
            device_class:
            - battery
          multiple: false
    power_light:
      name: The main light entity to control.
      description: The light entity which the top button will control. (Power button).
      selector:
        entity:
          domain:
          - light
          multiple: false
    hue_light:
      name: The secondary light entity to control.
      description: The light entity which the bottom button will control. (hue button).
      selector:
        entity:
          domain:
          - light
          multiple: false
    brightness_steps:
      name: Percentage to increase or decrease brightness.
      description: The Percentagem to increase or decrease brightness when the button
        is pressed or hold.
      selector:
        number:
          min: 1.0
          max: 25.0
          unit_of_measurement: '%'
          mode: slider
          step: 1.0
#  source_url: https://gist.github.com/brodock/0c85f4882b885d4d5499cd88d155c38c#file-huedimmer_rwl022-yaml
mode: restart
max_exceeded: silent
variables:
  power_light: !input power_light
  hue_light: !input hue_light
  brightness_steps: !input brightness_steps
trigger:
- platform: event
  event_type: hue_event
    event_data:
      device_id: !input remote
      cluster_id: 64512
action:
- variables:
    command: '{{ trigger.event.data.command }}'
    power_light_on: '{{ states(power_light) == ''on'' }}'
    hue_light_on: '{{ states(hue_light) == ''on'' }}'
- choose:
  - conditions: '{{ command == ''on_press'' }}'
    sequence:
      service: light.toggle
      data:
        entity_id: !input power_light
        transition: 0.5
  - conditions: '{{ command == ''off_press'' }}'
    sequence:
      service: light.toggle
      data:
        entity_id: !input hue_light
        transition: 0.5
  - conditions:
    - condition: or
      conditions:
      - '{{ command == ''up_press'' }}'
      - '{{ command == ''up_hold'' }}'
    sequence:
    - choose:
      - conditions:
        - '{{ power_light_on == false }}'
        - '{{ hue_light_on == false }}'
        sequence:
          service: light.turn_on
          data:
            entity_id:
            - !input power_light
            - !input hue_light
            transition: 0.5
            brightness_pct: '{{ brightness_steps }}'
      - conditions:
        - '{{ power_light_on == true }}'
        - '{{ hue_light_on == true }}'
        sequence:
          service: light.turn_on
          data:
            entity_id:
            - !input power_light
            - !input hue_light
            transition: 0.5
            brightness_step_pct: '{{ brightness_steps }}'
      - conditions:
        - '{{ power_light_on == true }}'
        sequence:
          service: light.turn_on
          data:
            entity_id:
            - !input power_light
            transition: 0.5
            brightness_step_pct: '{{ brightness_steps }}'
      - conditions:
        - '{{ hue_light_on == true }}'
        sequence:
          service: light.turn_on
          data:
            entity_id:
            - !input hue_light
            transition: 0.5
            brightness_step_pct: '{{ brightness_steps }}'
  - conditions:
    - condition: or
      conditions:
      - '{{ command == ''down_press'' }}'
      - '{{ command == ''down_hold'' }}'
    sequence:
    - choose:
      - conditions:
        - '{{ power_light_on == true }}'
        - '{{ hue_light_on == true }}'
        sequence:
          service: light.turn_on
          data:
            entity_id:
            - !input power_light
            - !input hue_light
            transition: 0.5
            brightness_step_pct: '{{ brightness_steps*-1 }}'
      - conditions:
        - '{{ power_light_on == true }}'
        sequence:
          service: light.turn_on
          data:
            entity_id:
            - !input power_light
            transition: 0.5
            brightness_step_pct: '{{ brightness_steps*-1 }}'
      - conditions:
        - '{{ hue_light_on == true }}'
        sequence:
          service: light.turn_on
          data:
            entity_id:
            - !input hue_light
            transition: 0.5
            brightness_step_pct: '{{ brightness_steps*-1 }}'

Lines start counting from 0 - could it be the line before that?