[
  {
    "name": "SimpleTask",
    "type": "TaskEngine",
    "parameters": [
      "p1",
      "p2"
    ],
    "execution_mode": "ONE_NODE",
    "allowed_role": null
  },
  {
    "name": "RunOnAllNodesTask",
    "type": "TaskEngine",
    "parameters": [
      "p1"
    ],
    "execution_mode": "ALL_NODES",
    "allowed_role": null
  },
  {
    "name": "SecurityAwareTask",
    "type": "TaskEngine",
    "parameters": [],
    "execution_mode": "ONE_NODE",
    "allowed_role": "MyRole"
  }
]