Systemd1 Starttransient Example

{
  "operation": "StartTransientUnit",
  "description": "Create a transient .scope unit on the fly that wraps an existing PID, applying a cgroup memory limit and CPU weight. This is how systemd-run, nspawn, and login session managers register processes with PID 1.",
  "request": {
    "name": "my-task.scope",
    "mode": "replace",
    "properties": {
      "Description": "Ad-hoc scope for background indexing job",
      "PIDs": [12345],
      "MemoryMax": 2147483648,
      "CPUWeight": 50,
      "Slice": "user.slice"
    },
    "aux": []
  },
  "response": {
    "path": "/org/freedesktop/systemd1/job/4812"
  }
}