const fetch = require('node-fetch');

let url = 'https://api.coralogix.com/mgmt/openapi/events2metrics/events2metrics/v2/batch';

let options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <API_KEY>', 'content-type': 'application/json'},
  body: '{"requests":[{"create":{"e2m":{"description":"avg and max the latency of catalog service","metricFields":[{"aggregations":[{"aggType":"AGG_TYPE_UNSPECIFIED","enabled":true,"samples":{"sampleType":"SAMPLE_TYPE_UNSPECIFIED"},"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","permutationsLimit":30000,"spansQuery":{"actionFilters":["myAction"],"applicationnameFilters":["myApp"],"lucene":"applicationName:myApp","serviceFilters":["myService"],"subsystemnameFilters":["mySubsystem"]},"type":"E2M_TYPE_UNSPECIFIED"}}}]}'
};

fetch(url, options)
  .then(res => res.json())
  .then(json => console.log(json))
  .catch(err => console.error('error:' + err));

{
  "matchingResponses": [
    {
      "created": {
        "e2m": {
          "createTime": "2022-06-30T12:30:00Z'",
          "description": "avg and max the latency of catalog service",
          "id": "d6a3658e-78d2-47d0-9b81-b2c551f01b09",
          "isInternal": true,
          "metricFields": [
            {
              "aggregations": "<any>",
              "sourceField": "<any>",
              "targetBaseMetricName": "<any>"
            }
          ],
          "metricLabels": [
            {
              "sourceField": "<any>",
              "targetLabel": "<any>"
            }
          ],
          "name": "Service_catalog_latency",
          "permutations": {
            "hasExceededLimit": true,
            "limit": 30000
          },
          "spansQuery": {
            "actionFilters": [
              "<any>"
            ],
            "applicationnameFilters": [
              "<any>"
            ],
            "lucene": "applicationName:myApp",
            "serviceFilters": [
              "<any>"
            ],
            "subsystemnameFilters": [
              "<any>"
            ]
          },
          "type": "E2M_TYPE_UNSPECIFIED",
          "updateTime": "2022-06-30T12:30:00Z'"
        }
      }
    }
  ]
}