replSet:PRIMARY> db.createView("view", "coll", [{$changeStream: {}}])
{
        "ok" : 1,
        "operationTime" : Timestamp(1506631823, 2),
        "$clusterTime" : {
                "clusterTime" : Timestamp(1506631823, 2),
                "signature" : {
                        "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
                        "keyId" : NumberLong(0)
                }
        }
}