retrieve:
Return the details about the given Memento id.

list:
List all Memento objects.

GET /api/v1/mementos/438/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "id": 438,
    "fr_name": "Formation continue en chaînes de valeur durables et résilientes EPFL",
    "en_name": "EPFL Executive Education in Sustainable Resilient Value Chains",
    "fr_label": null,
    "en_label": null,
    "slug": "exed-srvc",
    "is_main_memento": false,
    "is_active": true,
    "memento_url": "https://memento.epfl.ch/exed-srvc/"
}