Best Way to Learn JSON traffic in a browser using play.grafana.org

My goal is to share all of my code around using grafana to depict the state of integration tests in infrastructure as code scenarios. I’ve got all the code working with Terraform and Terratest. I’ve got basic JSON working with grafana.

Does anyone have any guidance on how to use https://play.grafana.org/d/000000012/grafana-play-home?orgId=1 to understand the http traffic using developer tooling in a browser so that I could replicate the JSON traffic?