Parse json data with logstash

Elastic Stack Logstash
5

Dear @Badger
following our suggestion now I'm able to correctly parse the JSON file. May I ask you why it is messing up a bit the order of the fields with respect to the input file? For example, the field LON is at the bottom or the field Z in the middle.

"@timestamp" => 2022-02-23T09:23:05.369615Z,
          "A403" => {
             "X" => 868708.0,
             "Y" => 4709148.0,
           "LAT" => 42.44694604132231,
        "values" => [
            [0] "2.296",
            [1] "7.033",
            [2] "2.298",
            [3] "2.275",
            [4] "7.207",
            [5] "5.456",
            [6] "4.794",
            [7] "4.24",
            [8] "4.748"
        ],
             "Z" => 849.0,
         "dates" => [
            [0] "2015-01-01",
            [1] "2015-01-02",
            [2] "2015-01-03",
            [3] "2015-01-04",
            [4] "2015-01-05",
            [5] "2015-01-06",
            [6] "2015-01-07",
            [7] "2015-01-08",
            [8] "2015-01-09"
        ],
           "LON" => 1.483146867002623
    },

thanks