Grok csv filter

Elastic Stack Logstash
3 
Thanks , i used the recommended format still no change,


       }
       mutate {

          gsub => [
                "message", "{", "",
                "message", "}", "",
                "message", "\t\t", "," ,
                "message", ":", "=",
                "message", "-", "=",
                "message", "\t", ",",
                "[payData][features]", " ", ""                     ]

        }

    json {
         source => "response"
         }

   csv {

        source => "[payData][features]"