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

let url = 'https://api.coralogix.com/mgmt/openapi/v1/policies:atomicOverwriteSpanPolicies';

let options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <API_KEY>', 'content-type': 'application/json'},
  body: '{"policies":[{"policy":{"name":"My Policy","description":"My Policy Description","priority":"PRIORITY_TYPE_UNSPECIFIED","applicationRule":{"ruleTypeId":"RULE_TYPE_ID_UNSPECIFIED","name":"string"},"subsystemRule":{"ruleTypeId":"RULE_TYPE_ID_UNSPECIFIED","name":"string"},"archiveRetention":{"id":"string"}},"spanRules":{"serviceRule":{"ruleTypeId":"RULE_TYPE_ID_UNSPECIFIED","name":"string"},"actionRule":{"ruleTypeId":"RULE_TYPE_ID_UNSPECIFIED","name":"string"},"tagRules":[{"ruleTypeId":"RULE_TYPE_ID_UNSPECIFIED","tagName":"tag_name","tagValue":"tag_value"}]}}]}'
};

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

{
  "createResponses": [
    {
      "policy": {
        "id": "policy_id",
        "companyId": 1234,
        "name": "My Policy",
        "priority": "PRIORITY_TYPE_UNSPECIFIED",
        "deleted": false,
        "enabled": true,
        "order": 1,
        "description": "My Policy Description",
        "applicationRule": {
          "ruleTypeId": "RULE_TYPE_ID_UNSPECIFIED",
          "name": "<string>"
        },
        "subsystemRule": {
          "ruleTypeId": "RULE_TYPE_ID_UNSPECIFIED",
          "name": "<string>"
        },
        "logRules": {
          "severities": [
            "SEVERITY_UNSPECIFIED"
          ]
        },
        "spanRules": {
          "serviceRule": {
            "ruleTypeId": "RULE_TYPE_ID_UNSPECIFIED",
            "name": "<string>"
          },
          "actionRule": {
            "ruleTypeId": "RULE_TYPE_ID_UNSPECIFIED",
            "name": "<string>"
          },
          "tagRules": [
            {
              "ruleTypeId": "RULE_TYPE_ID_UNSPECIFIED",
              "tagName": "tag_name",
              "tagValue": "tag_value"
            }
          ]
        },
        "createdAt": "2021-01-01T00:00:00.000Z",
        "updatedAt": "2021-01-01T00:00:00.000Z",
        "archiveRetention": {
          "id": "<string>"
        }
      }
    }
  ]
}