This will be a GET request sent to /api/cards/{cardId}/activities.

The response of the API will be similar to the following:

{
  "activities": [{
    "id": 3,
    "type": "add-comment",
    "detail": "{"comment": "This is a test comment."}",
    "userId": 1,
    "createdDate": 1538239135000
  }]
}