using LukeHagar.PlexAPI.SDK;
using LukeHagar.PlexAPI.SDK.Models.Components;

var sdk = new PlexAPI(accessToken: "<YOUR_API_KEY_HERE>");

var res = await sdk.Activities.GetServerActivitiesAsync();

// handle response

{
  "MediaContainer": {
    "size": 123,
    "Activity": [
      {
        "uuid": "<string>",
        "type": "<string>",
        "cancellable": true,
        "userID": 123,
        "title": "<string>",
        "subtitle": "<string>",
        "progress": 123,
        "Context": {
          "librarySectionID": "<string>"
        }
      }
    ]
  }
}