db.samples.insert({a:'second example'});

WriteCommandError({
        "operationTime" : Timestamp(1556540073, 1),
        "ok" : 0,
        "errmsg" : "not master",
        "code" : 10107,
        "codeName" : "NotMaster",
        "$clusterTime" : {
                "clusterTime" : Timestamp(1556540073, 1),
                "signature" : {
                        "hash" : BinData(0,"6rJ5s+01CUojtKF/vsnaM5A6lyw="),
                        "keyId" : NumberLong("6678682743804526594")
                }
        }
})