Help in Alert using watcher

Elastic Stack Elasticsearch
4

Please see: https://github.com/elastic/examples/blob/master/Alerting/Sample%20Watches/filesystem_usage/watch.json

  "actions": {
    "log": {
      "logging": {
        "text": {
          "inline": "Some hosts are over {{ctx.payload.threshold}}% utilized:{{#ctx.payload.hosts}}{{disk_usage}}%-{{key}}:{{/ctx.payload.hosts}}"
        }
      }
    }
  }