Returns a single membership selected by `id`.
GET /api-openparlamento/v1/19/memberships_votes/8938978/?format=api
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "id": 8938978,
    "voting_slug": "19-116-8",
    "sitting": {
        "id": 1504,
        "date": "2023-10-24",
        "number": 116,
        "branch": "S"
    },
    "title": "Competitività dei capitali - Em. 4.4, Tajani e altri",
    "vote": "PNV",
    "group": {
        "id": 1,
        "acronym": "FI-BP-PPE",
        "slug": "FI",
        "branch": "senato",
        "name": "Forza Italia Berlusconi Presidente",
        "color": "#1E6996"
    },
    "group_vote": "NO"
}