Help: Format The Watcher Email Body Section

Elastic Stack Elasticsearch
1

Hi there:
I'm currently using this code {{ctx.payload.payload_result}} in my email body to print out the health check status but the format is not ideal (see below), is there a way I can organize it nicely(see proposed output)? Thanks so much.

"payload_result": {
          "summary": {
            "unavailable": {
              "system1-health-check-status": [
                "system1-host"
              ],
              "system2-health-check-status": [
                "system2-host"
              ],
              "system3-health-check-status": [
                "system3-host"
              ],
              "system4-health-check-status": [
                "system4-host"
              ],
              "system5-health-check-status": [
                "system5-host"
            }
         }
      }

Proposed Output:

system1-health-check-status
 -system1-host

system2-health-check-status
 -system2-host

system3-health-check-status
 -system3-host

system4-health-check-status
 -system4-host

system5-health-check-status
 -system5-host
2

You can loop through a list in your payload result and then do some formatting...

Can you share what you tried so far, because I am only seeing JSON here, which does not help too much from my perspective.

Thanks!