title: unable to filter by metric (comparisonValue not recongnized in the 400 value
body: <p>I am trying to filter my GA api V4 in python by removing pageviews under 200 in my request...
  surprisingly, as i follow exactly the syntax of the documentation, i get an error message :</p>
  <pre><code>&gt;  &quot;Invalid JSON payload received. Unknown name &quot;comparisonValue&quot; at 'report_req
  uests[0].metric_filter_clauses[0].filters[0]': Proto field is not repeating, cannot start list.&quot;. Details: &quot;[{'
  @type': 'type.googleapis.com/google.rpc.BadRequest', 'fieldViolations': [{'field': 'report_requests[0].metric_f
  ilter_clauses[0].filters[0]', 'description': 'Invalid JSON payload received. Unknown name &quot;comparisonValue&quot; at 
  \'report_requests[0].metric_filter_clauses[0].filters[0]\': Proto field is not repeating, cannot start list.'}]
  }]&quot;
  </code></pre>
  <p>obviously there is a problem in my coding, but I cannot understand what it is : it is a copy paste of the documentation in <a href="https://developers.google.com/analytics/devguides/reporting/core/v4/basics#filtering.." rel="nofollow noreferrer">https://developers.google.com/analytics/devguides/reporting/core/v4/basics#filtering..</a>.
  is there a difference between the JSON POST from documentation and the one in the batch get from python?
  here is the part where I build my request the problematic filter is at the end...:</p>
  <pre><code> return analytics.reports().batchGet(
       body={
         'reportRequests': [
          {
              'viewId': VIEW_ID,
              'dateRanges': [{'startDate': '2021-07-20', 'endDate': '2021-07-27'}],
              'metrics': [
                  {
                      'expression': 'ga:sessions',
                      'expression': 'ga:pageviews'
                      }],
              'dimensions': [
                  {
                      'name': 'ga:pagePath'
                      }],
              'orderBys': [
                  {
                      'orderType': 'VALUE',
                      'sortOrder': &quot;DESCENDING&quot;,
                      'fieldName': 'ga:pageviews'
                      }],
              'dimensionFilterClauses': [
                  {
                      'filters': [
                          {
                              'dimensionName':'ga:country',
                              'operator':'BEGINS_WITH',
                              'expressions':['fra']
                              }],
                      }],
              'metricFilterClauses': [
                  {
                      'filters': [
                          {
                              'metricName':'ga:pageviews',
                              'operator':'GREATER_THAN',
                              'comparisonValue':['200']                                                          
                              }]
                      }]
              }]
        }
  ).execute()
  </code></pre>
  <p>any idea why it don't work?
  thanks :)</p>