Filebeat-netflow to logstash send only specific fields

hello good morning

I need your help to send the data from a filebeat-netflow to logstash and filter the fields that I need only to send it to my elastic cloud, I mean, I can specify which fields are sent only, so that I do not generate so many unnecessary fields.

thank you I hope for your prompt response, I share file netflow.yml

- module: netflow
    enabled: true
      netflow_port: 2055
      max_message_size: 1KiB
      protocols: [ v5, v9, ipfix ]
      expiration_timeout: 30m
      queue_size: 1000
      detect_sequence_reset: true

config logstash output:

input {
  beats {
  port => 2055

filter {

 prune {
        whitelist_names => [ "method", "(referrer|status)", "${some}_field" ]

output {
#  stdout{ }
  elasticsearch {
    hosts => [""]
    user => "elastic"
    password => "xxxx"
    index => "ntw"

this would be where the data would be sent to my elastic cloud, but I need it to send only specific fields

for example these fields are the ones sent by netflow and I only want it to send the ones marked in red:

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