> db.currentOp();
...
               {
                        "type" : "op",
                        "host" : "hot-potato:20020",
                        "desc" : "IndexBuildsCoordinatorMongod-0",
                        "active" : true,
                        "currentOpTime" : "2020-03-04T15:06:51.107-0500",
                        "opid" : 51,
                        "secs_running" : NumberLong(21),
                        "microsecs_running" : NumberLong(21991057),
                        "op" : "command",
                        "ns" : "",
                        "command" : {
                                "createIndexes" : "test",
                                "indexes" : [
                                        {
                                                "v" : 2,
                                                "key" : {
                                                        "a" : 1
                                                },
                                                "name" : "a_1",
                                                "background" : true
                                        }
                                ],
                                "lsid" : {
                                        "id" : UUID("7ee7f65b-d9fa-4009-84b0-5561b7f25744")
                                },
                                "$db" : "test"
                        },
...