Watcher nested aggregations with "direction"

Yes, I saw all of this. I've been looking at json and don't see anything wrong - looks like everything is properly formatted/quoted with matching/balanced curlies:

 49           "aggregations":{
 50              "minutes":{
 51                "date_histogram":{
 52                   "field": "@timestamp",
 53                   "interval": "minute",
 54                   "offset": 0,
 55                   "order":{
 56                      "_key": "asc"
 57                   },
 58                   "keyed": false,
 59                   "min_doc_count": 0
 60                },
 61                "aggregations":{
 62                    "nodes":{
 63                       "terms":{

What am I missing?