update_task_message.yml

---
# Playbook to set a user message in the MiqRequestTask
# You can pass in extra vars 
# manageiq_api_url
# manageiq_task_href_slug
# manageiq_username
# manageiq_password
# manageiq_message
- hosts: localhost
  vars:
    options: { 'user_message': "{{ manageiq_message }}" }

  tasks:
    - name: Set the task url
      set_fact:
        task_url: "{{ manageiq_api_url }}/api/{{ manageiq_task_href_slug }}"

    - name: Set the user message in the task
      uri:
        url: "{{ task_url }}"
        method: POST
        user: "{{ manageiq_username }}"
        password: "{{ manageiq_password }}"
        body:
          action: edit
          resource: "{ 'options': {{ options }}}"
        body_format: json
        validate_certs: False
        headers:
          Content-Type: "application/json" 
        status_code: 200
      register: output