curl --request PUT \
  --url https://harness.example.com/admin/governance-extensions \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "base_revision": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "packages": [
    {
      "id": "<string>",
      "version": "<string>",
      "source_ref": "<string>",
      "sha256": "<string>",
      "name": "<string>",
      "artifact_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "platform_sources": {},
      "settings": {},
      "adapters": {}
    }
  ]
}
'

const options = {
  method: 'PUT',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    base_revision: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    packages: [
      {
        id: '<string>',
        version: '<string>',
        source_ref: '<string>',
        sha256: '<string>',
        name: '<string>',
        artifact_id: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
        platform_sources: {},
        settings: {},
        adapters: {}
      }
    ]
  })
};

fetch('https://harness.example.com/admin/governance-extensions', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://harness.example.com/admin/governance-extensions"

payload = {
    "base_revision": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "packages": [
        {
            "id": "<string>",
            "version": "<string>",
            "source_ref": "<string>",
            "sha256": "<string>",
            "name": "<string>",
            "artifact_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
            "platform_sources": {},
            "settings": {},
            "adapters": {}
        }
    ]
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

{
  "revision": "251e6087-98cf-4861-9668-f09f537d5e4d",
  "yaml": "<string>",
  "managed_yaml": "<string>",
  "document": {
    "revision": "251e6087-98cf-4861-9668-f09f537d5e4d",
    "allowed_harnesses": [
      "<string>"
    ],
    "contract_version": 1,
    "required_capabilities": [
      "adapter_intervals"
    ],
    "minimum_client_version": "<string>",
    "ttl_seconds": 300,
    "required": true,
    "harnesses": {},
    "packages": [
      {
        "id": "<string>",
        "version": "<string>",
        "source_ref": "<string>",
        "sha256": "<string>",
        "name": "<string>",
        "artifact_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
        "platform_sources": {},
        "settings": {},
        "adapters": {}
      }
    ],
    "gateway": {
      "type": "<string>",
      "proxy_url": "<string>",
      "token": "<string>",
      "auth_style": "bearer"
    },
    "session_upload": {
      "presign_url": "<string>"
    },
    "telemetry": {
      "sink_url": "<string>"
    }
  },
  "package_audiences": {},
  "created_at": "2023-11-07T05:31:56Z"
}