Global storage for dynamic data

Configuration
1

Hi,

I am new to Home Assistant and seeking a method to store data that can be accessed by different automations. It should function similar to a dictionary, allowing me to dynamically set key value pairs. It is not necessary for the data to persist on reboot.

I tried to use an input_text to store a dictionary as json:

input_text:
  latest_window_notification_automations:
    name: Latest Window Notification Automations
    initial: '{}'

action:
  - service: input_text.set_value
    data_template:
      entity_id: input_text.latest_window_notification_automations
      value: >-
        {% set current = states('input_text.latest_window_notification_automations') | from_json %}
        {% set set_item = dict({trigger.entity_id: this.context.id}) %}
        {% set updated = dict(current.items(), **set_item) %}
        {{ updated | to_json }}

This approach works well for a single item in the dictionary but encounters an issue when trying to store multiple items. I have observed an error in the home-assistant.log that appears to be related to a length limit:

WARNING (MainThread) [homeassistant.components.input_text] Invalid value: {"binary_sensor.hmip_bathroom_window":"01HDCK4FA29N98N9JE9DMJB4GX","binary_sensor.hmip_office_window":"01HDCMPWB9QHBMX2YZTZ70METM"} (length range 0 - 100)

Is there an issue with the code, or does it simply not function in that manner?