https://stackoverflow.com/questions/53307595/ansible-how-print-number-instead-string-in-json-module-uri

test.yml

---
- hosts: localhost
  connection: local
  gather_facts: no

  vars:
    var_name: "william"
    var_port: "80"

  tasks:
    - set_fact:
        json_str: |
          {
            "title": "_NAME_",
            "port": _PORT_
          }

    - debug: var=json_str

    - set_fact:
        json_str_with_variables: "{{ json_str | regex_replace('_NAME_', var_name) | regex_replace('_PORT_', var_port) }}"

    - debug: var=json_str_with_variables

    - set_fact:
        my_dict:
          some: thing
          data: "{{ json_str_with_variables }}"

    - debug: var=my_dict

Output:

$ ansible-playbook test.yml 

PLAY [localhost] ***********************************************************************************************************

TASK [set_fact] ************************************************************************************************************
ok: [localhost]

TASK [debug] ***************************************************************************************************************
ok: [localhost] => {
    "json_str": "{\n  \"title\": \"_NAME_\",\n  \"port\": _PORT_\n}\n"
}

TASK [set_fact] ************************************************************************************************************
ok: [localhost]

TASK [debug] ***************************************************************************************************************
ok: [localhost] => {
    "json_str_with_variables": {
        "port": 80, 
        "title": "william"
    }
}

TASK [set_fact] ************************************************************************************************************
ok: [localhost]

TASK [debug] ***************************************************************************************************************
ok: [localhost] => {
    "my_dict": {
        "data": {
            "port": 80, 
            "title": "william"
        }, 
        "some": "thing"
    }
}

PLAY RECAP *****************************************************************************************************************
localhost                  : ok=6    changed=0    unreachable=0    failed=0