Extracting the JSON fields from the message

Elastic Stack Logstash
2

Also tried without using mutate and it didn't work.

    filter {
	    json { 
	        source => "message"
		    add_field => { 
			    "requestUrl" => "%{[message][requestUrl]}"
			    "requestUri" => "%{[message][requestUri]}"
			    "requestMethod" => "%{[message][requestMethod]}"
			    "requestHeaders" => "%{[message][requestHeaders]}"
			    "requestBody" => "%{[message][requestBody]}"
		    }
	    }
    }