Get harmony activity for templateswitch

Configuration
1

I want to use the current activity for showing the state of a templateswitch.
with a Sensor i can get the actual activity via:

states.remote.harmony.attributes.current_activity

But the switch wont turn On with this lines, what is false?

   - platform: template
     switches:
       fernseher:
         value_template: "{% if is_state('states.remote.harmony.attributes.current_activity', 'Fernsehen') %}on{% else %}off{% endif %}"
         turn_on:
           service: remote.turn_on
           entity_id: remote.harmony
           data:
             activity: "23292532"
         turn_off:
           service: remote.turn_off
           entity_id: remote.harmony

Thanks for your help!

2

got it with reading the sensor

Sensor:
     - platform: template
        sensors:
          wohnzimmer:
            value_template: '{{ states.remote.harmony.attributes.current_activity }}'
            friendly_name: 'Aktuelle Activity'

switches:
      fernseher:
        value_template: "{% if is_state('sensor.wohnzimmer', 'Fernsehen') %}on{% else %}off{% endif %}"