import requests

url = "https://{FUSION HOST}/api/apps"

payload = {
    "id": "MyNewApp",
    "name": "My new app",
    "description": "A really great new app"
}
headers = {"Content-Type": "application/json"}

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

print(response.text)

{
  "id": "MyNewApp",
  "name": "My new app",
  "description": "A really great new app"
}