Highcharts: xAxis in datetime format (00:00 - 24:00) and n series with n intervals in datetime format

I will try to explain better, starting with this image, which should make you better understand what I want to display in the graph. (the data will be taken from the database, but it doesn't matter)

During each day (and this graph represents one day), I would like to see on the diagram all users (at most 5-6) who have done at least one "action". These "actions" have a start time and an end time .

In this case, users are a series. And each series is a list of intervals (times) of all actions taken by the user on that day.

An example of a series of users who performed three actions on that day (yes, the timestamp will be multiplied by 1000)

[["1430362800","1430366400"],["1430391600","1430398800"],["1430424000","1430425800"]]

      

        
        
        
      

    

To view on the x-axis the interval 00:00 - 24:00, I will do

xAxis: {
    type: 'datetime',
    tickInterval: 3600 * 1000
}

      

        
        
        
      

    

Each horizontal line must be user-defined. For this I have to set the maximum and minimum of the y-axis. And for example, if users have 3, I will do something like this (I will only add one axis, and the (y) value of each user should be 1,2,3 ...).

chart.addAxis({
    min: 1,
    max : 3,
    ceiling:1,
    tickInterval: 1,
    labels: {
        formatter: function() {
             if (this.value <= 3){
                  return "";
             }else{
                  return null;
             }
         }
    }
});

      

        
        
        
      

    

The problem is, I don't know what type of chart is used to display this data type. Thanks to