Change Attribute of a timer

Configuration
4

https://community.home-assistant.io/t/how-to-help-us-help-you-or-how-to-ask-a-good-question/114371#oneone-format-it-properly-16

action: timer.start
target:
  entity_id: timer.wembley_bewasserung
data:
  duration: "{{ states('input_select.zeit_drop') }}"