format2.md

$ cat example.json
{
  "units": {
    "ambassador.service": {
      "includes": ["ambassador.json", "restart_policy.json"],
      "overrides": {
        "Unit": {
          "Wants": ["user-app.service]
        },
      }
    },
    "user-app.service": {
      "includes": ["restart_policy.json"],
      "systemd": {
        "Unit": {
          "Description": "description",
          "Wants": [
            "ambassador.service",
            "lb-register.service"
          ],
          "After": [
            "ambassador.service"
          ]
        },
        "Service": {
          "ExecStart": "docker run..."
        },
        "X-Fleet": {
          "Global": true
        }
      }
    },
    "lb-register.service": {
      "includes": ["restart_policy.json"],
      "systemd": {
        "Unit": {
          "Description": "description",
          "Wants": [
            "user-app.service"
          ],
          "After": [
            "user-app.service"
          ]
        },
        "Service": {
          "ExecStart": "docker run..."
        },
        "X-Fleet": {
          "Global": true
        }
      }
    }
  }
}

$ cat ambassador.json
{
  "systemd": {
    "Unit": {
      "Description": "description",
      "Wants": []
    },
    "Service": {
      "ExecStart": "docker run..."
    },
    "X-Fleet": {
      "Global": true
    }
  }
}

$ cat restart_policy.json
{
  "Restart": "on-failure",
  "RestartSec": "1s",
  "StartLimitInterval": "300s",
  "StartLimitBurst": "3",
  "TimeoutStartSec": "0"
}