Returns a single membership selected by `id`.
GET /api-openparlamento/v1/19/memberships_votes/9569404/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "id": 9569404,
    "voting_slug": "19-138-22",
    "sitting": {
        "id": 1559,
        "date": "2023-12-19",
        "number": 138,
        "branch": "S"
    },
    "title": "d-l n. 161/2023 - Piano Mattei - Em. 1.20, Aurora Floridia e altri",
    "vote": "NO",
    "group": {
        "id": 2,
        "acronym": "FdI",
        "slug": "FdI",
        "branch": "senato",
        "name": "Fratelli d'Italia",
        "color": "#37A6A5"
    },
    "group_vote": "NO"
}