If you are referring to the out put am seeing in kibana for heartbeat .
{
  "_index": "heartbeat-2019.05.08-000001",
  "_type": "_doc",
  "_id": "rMbhnWoB3maiDp4b8tnO",
  "_version": 1,
  "_score": null,
  "_source": {
    "@timestamp": "2019-05-09T18:36:30.778Z",
    "tls": {
      "rtt": {
        "handshake": {
          "us": 17418
        }
      },
      "certificate_not_valid_before": "0001-01-01T00:00:00.000Z"
    },
    "fields": {
      "version": "10.6"
    },
    "agent": {
      "ephemeral_id": "3749dae6-fa12-445e-a247-b01ac8b6a4be",
      "hostname": "hostname1.changed.com",
      "id": "2ad2e338-bbe9-4068-b6fc-fc60e7cc1d71",
      "version": "7.0.0",
      "type": "heartbeat"
    },
    "monitor": {
      "type": "http",
      "check_group": "157de181-7289-11e9-a7d1-005056ac9316",
      "ip": "127.0.0.1",
      "status": "up",
      "duration": {
        "us": 40478
      },
      "id": "auto-http-0XEB9699FEE4978E58",
      "name": ""
    },
    "summary": {
      "up": 1,
      "down": 0
    },
    "tcp": {
      "rtt": {
        "connect": {
          "us": 144
        }
      }
    },
    "event": {
      "dataset": "uptime"
    },
    "ecs": {
      "version": "1.0.0"
    },
    "host": {
      "name": "hostname1.changed.com",
      "hostname": "hostname1.changed.com",
      "architecture": "x86_64",
      "os": {
        "platform": "rhel",
        "version": "7.5 (Maipo)",
        "family": "redhat",
        "name": "Red Hat Enterprise Linux Server",
        "kernel": "3.10.0-862.14.4.el7.x86_64",
        "codename": "Maipo"
      },
      "id": "0709cd0acc86463da7d518c28f145a66",
      "containerized": true
    },
    "http": {
      "rtt": {
        "response_header": {
          "us": 1722
        },
        "validate": {
          "us": 1773
        },
        "content": {
          "us": 50
        },
        "total": {
          "us": 39971
        },
        "write_request": {
          "us": 48
        }
      },
      "response": {
        "status_code": 200
      }
    },
    "resolve": {
      "rtt": {
        "us": 306
      },
      "ip": "127.0.0.1"
    },
    "url": {
      "scheme": "https",
      "domain": "hostname1.changed.com",
      "port": 7443,
      "path": "/home",
      "full": "https://hostname1.changed.com:7443"
    }
  },
  "fields": {
    "@timestamp": [
      "2019-05-09T18:36:30.778Z"
    ],
    "tls.certificate_not_valid_before": [
      "0001-01-01T00:00:00.000Z"
    ]
  },
  "sort": [
    1557426990778
  ]
}