Fetch JSON data at specific levels.

sample input document looks like below:

    {

      "organisation":{

        "Engineering":{

          "Research":{

            "field1":"value1",

            "field2":"value2",

            "field3":"value3",

            "Development":{

              "field1":"value1",

              "field2":"value2",

              "field3":"value3"

            }

          },

          "field1":"value1",

          "field2":"value2",

          "field3":"value3"

        },

        "HR":{

          "Payroll":{

            "field1":"value1",

            "field2":"value2",

            "field3":"value3",

            "Performance":{

              "field1":"value1",

              "field2":"value2",

              "field3":"value3"

            }

          },

          "field1":"value1",

          "field2":"value2",

          "field3":"value3"

        }

      }

    }

Sample output for level_1 query to include only level_1 nodes i.e., in this case should be

     {

      "Engineering":{

        "field1":"value1",

        "field2":"value2",

        "field3":"value3"

      },

      "HR":{

        "field1":"value1",

        "field2":"value2",

        "field3":"value3"

      }

    }

Sample output for level_3 query

    {

      "Development":{

        "field1":"value1",

        "field2":"value2",

        "field3":"value3"

      },

      "Performance":{

        "field1":"value1",

        "field2":"value2",

        "field3":"value3"

      }

    }