[
    {
      "first_step": {
        "call": "http.get",
        "args": {
          "url": "http://localhost:1234/callA"
        },
        "next": "third_step"
      }
    },
    {
      "third_step": {
        "call": "http.get",
        "args": {
          "url": "http://localhost:1234/callB"
        },
        "next": "fourth_step"
      }
    },
    {
      "second_step": {
        "call": "http.get",
        "args": {
          "url": "http://localhost:1234/callC"
        },
        "next": "end"
      }
    },
    {
      "fourth_step": {
        "call": "http.get",
        "args": {
          "url": "http://localhost:1234/callD"
        },
        "next": "second_step"
      }
    }
]