CallMembershipDataLegacy: {
    application: string;
    call_id: string;
    created_ts?: number;
    device_id: string;
    foci_active?: Focus[];
    key_distribution?: KeyDistributionMechanism;
    membershipID: string;
    scope: CallScope;
} & EitherAnd<{
    expires: number;
}, {
    expires_ts: number;
}>