dynamic json syntax issue

I’m trying to dynamically create the JSON response needed for my REST request, I can hard code the JSON var and it works but when I add a variable it fails.

- name: add ssh key to stash via api
  uri:
    url: "{{stash_api_url}}"
    user: "{{stash_username}}"
    password: "{{stash_password}}"
    force_basic_auth: yes
    method: POST
    body: '''{"text":"{{stash_ansible_ssh_key_contents.stdout}}"}'''
    body_format: json
    status_code: 201,409
    HEADER_Content-Type: "application/json"
    register: ssh_key_added_to_stash
    when: stash_ansible_ssh_key_contents.stdout != -1

tried:
- body: '{"text":"{{stash_ansible_ssh_key_contents.stdout}}"}'
- body: ''{"text":"{{stash_ansible_ssh_key_contents.stdout}}"}''
- body: '''{"text":"{{stash_ansible_ssh_key_contents.stdout}}"}'''

if I reverse the single and double quotes there is still an issue

Hardcoding this works:

{
“text”: “my value here”
}