capturing RESTAPI traffic on apache server using tshark

Is it possible to capture incoming REST API requests to an tomcat server, in order to validate whether external clients are using proper credentials. 401 responses are produced but we need to prove that the REST API is not the problem but rather the requests. We do however have an haproxy handling incoming requests so not sure if this will work. If it is possible, how do we do this?

tshark -f "tcp port 22" -w /tmp/capture.txt