Ansible clean up task output

I have the following playbook, how can I clean up my returned data removing all the extra characters?

  tasks:
   - name: Health Status
     shell: curl -XGET 'http://{{ ansible_host }}:9200/_cluster/health?pretty=true'
     retries: 5
     delay: 10
     register: health

   - name: Print Health check
     debug: var=health.stdout_lines[2],health.stdout_lines[4]

Current Result

ok: [ELK22] => {
    "health.stdout_lines[2],health.stdout_lines[4]": "(u'  \"status\" : \"green\",', u'  \"number_of_nodes\" : 1,')"
}

Required Result

[ELK22] => {
status: green
number of nodes: 1
}

Using the example output of How to check Elasticsearch cluster health?, a minimal example playbook

---
- hosts: localhost
  become: false
  gather_facts: false

  vars:

    health:
      stdout: |
        {
          "cluster_name" : "xxxxxxxx",
          "status" : "green",
          "timed_out" : false,
          "number_of_nodes" : 2,
          "number_of_data_nodes" : 2,
          "active_primary_shards" : 15,
          "active_shards" : 12,
          "relocating_shards" : 0,
          "initializing_shards" : 0,
          "unassigned_shards" : 0,
          "delayed_unassigned_shards" : 0,
          "number_of_pending_tasks" : 0,
          "number_of_in_flight_fetch" : 0
        }

  tasks:

  - name: Show value
    debug:
      msg: "{{ health.stdout | from_json | json_query('number_of_nodes') }}"

will result into an output of

TASK [Show value] ******
ok: [localhost] =>
  msg: '2'