Get an E2M

Example response

{
  "e2m": {
    "createTime": "2022-06-30T12:30:00.000Z",
    "dataSource": "my_namespace/my_dataset",
    "description": "avg and max the latency of catalog service",
    "id": "d6a3658e-78d2-47d0-9b81-b2c551f01b09",
    "logsQuery": {
      "alias": "new_query",
      "applicationnameFilters": [
        "app_name"
      ],
      "lucene": "log_obj.numeric_field: [50 TO 100]",
      "subsystemnameFilters": [
        "sub_name"
      ]
    },
    "metricFields": [
      {
        "aggregations": [
          {
            "histogram": {
              "buckets": [
                2
              ]
            },
            "targetMetricName": "alias_field_name_agg_func"
          }
        ],
        "sourceField": "log_obj.numeric_field",
        "targetBaseMetricName": "alias_field_name"
      }
    ],
    "metricLabels": [
      {
        "sourceField": "log_obj.string_value",
        "targetLabel": "alias_label_name"
      }
    ],
    "name": "Service_catalog_latency",
    "permutations": {
      "limit": 30000
    },
    "spansQuery": {
      "actionFilters": [
        "myAction"
      ],
      "applicationnameFilters": [
        "myApp"
      ],
      "lucene": "applicationName:myApp",
      "serviceFilters": [
        "myService"
      ],
      "subsystemnameFilters": [
        "mySubsystem"
      ]
    },
    "updateTime": "2022-06-30T12:30:00.000Z"
  }
}