exampleEnvelope.js

// null values can be anything
let envelope = {
    "Mode": "GameServer",
        "Settings": {
        "PlaceId": placeId,
        "PlaceFetchUrl": `http://${domain}/${null}/`,
        "UniverseId": universeId,
        "MatchmakingContextId": 1,
        "CreatorId": userId,
        "CreatorType": "User",
        "GameId": null,
        "MachineAddress": server.ip,
        "PreferredPort": sever.port,
        "PlaceVersion": placeVersion || assetVersion,
        "BaseUrl": domain,
        "GsmInterval": 10000,
        "MaxPlayers": maxPlayers,
        "MaxGameInstances": 1,
        "ApiKey": place.apiKey,
        "PreferredPlayerCapacity": preferredPlayerCapacity,
        "PlaceVisitAccessKey": place.visitAccessKey
    }
}