Find key contain dot and replace with @

I have nested object which can have any number of key at any depth. I want to replace "." in all keys(if contain) with "@" How we can do this in efficient way.

Example Node js object

obj:{
        "BotBuilder.Data.SessionState": {
            "lastAccess": 1492886892545,
            "version": 14,
            "callstack": [
                {
                    "id": "*:/",
                    "state": {
                        "BotBuilder.Data.WaterfallStep": 0,
                        "BotBuilder.Data.Intent": "welcomeDialog"
                    }
                }
            ]
        }

Currently i am using hard coded solution , but any keys can be possible in object at any level which contain "." I want generalize way to solve this problem

My code :

replaceDot:function(doc){
    var finalobj={}
    var finaldata={}
    var finalcallstack=new Array();
    console.log("doc==>",doc)
    var callstack=doc["data"]["BotBuilder.Data.SessionState"]["callstack"]
    for(var i = 0; i < callstack.length; i++) {
        var tempcallstack={}
        if("BotBuilder.Data.WaterfallStep" in callstack[i]["state"]){
            tempcallstack["id"]=callstack[i]["id"]
            var tempstate={}
            tempstate["state"]=callstack[i]["state"]
            tempstate["state"]["BotBuilder@Data@WaterfallStep"]=tempstate["state"]["BotBuilder.Data.WaterfallStep"]
            tempstate["state"]["BotBuilder@Data@Intent"]=tempstate["state"]["BotBuilder.Data.Intent"]
            delete tempstate["state"]["BotBuilder.Data.WaterfallStep"]
            delete tempstate["state"]["BotBuilder.Data.Intent"]
            tempcallstack["state"]=tempstate["state"];
            finalcallstack.push(tempcallstack);
        }
        else{
            finalcallstack.push(callstack[i]);
        }
    }   
    var obj={}
    finalobj["lastAccess"]=doc["data"]["BotBuilder.Data.SessionState"]["lastAccess"]
    finalobj["version"]=doc["data"]["BotBuilder.Data.SessionState"]["version"]
    finalobj["callstack"]=finalcallstack;
    obj["BotBuilder@Data@SessionState"]=finalobj
    var secondrootobj={"BotBuilder@Data@SessionState":finalobj}
    return secondrootobj;
}

via Aakash Kag