curl --request PUT \
  --url https://harness.example.com/admin/harnesses/{harness}/managed-config \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "base_revision": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "managed_config_yaml": "<string>"
}
'

const options = {
  method: 'PUT',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    base_revision: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    managed_config_yaml: '<string>'
  })
};

fetch('https://harness.example.com/admin/harnesses/{harness}/managed-config', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://harness.example.com/admin/harnesses/{harness}/managed-config"

payload = {
    "base_revision": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "managed_config_yaml": "<string>"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.put(url, json=payload, headers=headers)

print(response.text)

{
  "revision": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "harness": "<string>",
  "managed_config_yaml": "<string>",
  "allow_unverified_versions": true,
  "version_requirement": "<string>"
}