import requests

url = "http://api/apollo/links"

payload = {
    "subject": {
        "type": "APPKIT_APP",
        "id": "<string>",
        "canonicalName": "<string>",
        "uri": "<string>"
    },
    "object": {
        "type": "APPKIT_APP",
        "id": "<string>",
        "canonicalName": "<string>",
        "uri": "<string>"
    }
}
headers = {"Content-Type": "application/json"}

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

print(response.text)

{
  "subject": {
    "type": "APPKIT_APP",
    "id": "<string>",
    "canonicalName": "<string>",
    "uri": "<string>"
  },
  "object": {
    "type": "APPKIT_APP",
    "id": "<string>",
    "canonicalName": "<string>",
    "uri": "<string>"
  },
  "linkType": "DependsOn",
  "originator": "<string>"
}