Variables in configuration?

Hello! I’m very new at Home Assistant. I have created a rest-sensor reading some values from Animus Heart, it looks like this:

sensor:
  - platform: rest
    name: office_sensors
    resource: http://10.79.3.36/rest/devices/com.animushome.heart.packages.rf433.3bc6421c-5c7f-4911-b4b1-1acf249becfa/functions
    scan_interval: 900
    json_attributes:
      - "com.animushome.heart.packages.rf433.3bc6421c-5c7f-4911-b4b1-1acf249becfa:f-8193.0" # TEMP
      - "com.animushome.heart.packages.rf433.3bc6421c-5c7f-4911-b4b1-1acf249becfa:f-8193.1" # HUMID
    method: GET
    value_template: "OK"
    headers:
      authorization: !secret animus_auth_header
  - platform: template
    sensors:
      office_temperature:
        value_template: "{{ state_attr('sensor.office_sensors', 'com.animushome.heart.packages.rf433.3bc6421c-5c7f-4911-b4b1-1acf249becfa:f-8193.0')['functionProperties']['data']['value']['level'] }}"
        device_class: temperature
        unit_of_measurement: "°C"
      office_humidity:
        value_template: "{{ state_attr('sensor.office_sensors', 'com.animushome.heart.packages.rf433.3bc6421c-5c7f-4911-b4b1-1acf249becfa:f-8193.1')['functionProperties']['data']['value']['level'] }}"
        device_class: "humidity"
        unit_of_measurement: "%"
      office_timestamp:
        value_template: "{{ (state_attr('sensor.office_sensors', 'com.animushome.heart.packages.rf433.3bc6421c-5c7f-4911-b4b1-1acf249becfa:f-8193.0')['functionProperties']['data']['value']['timestamp'] | int/1000) | timestamp_local }}"
        device_class: "timestamp"

The device ID com.animushome.heart.packages.rf433.3bc6421c-5c7f-4911-b4b1-1acf249becfa is repeated a lot of times. Any way to store this in a variable so I can reuse the ID? This is just the first sensor…have couple more to do.