Simple JSON catalogue representation:

JSON catalogue representation with details associated (it opens up ESASky data panel with the details written into the data section of each source):

{
   "overlaySet":{
      "type":"SourceListOverlay",
      "overlayName":"bla bla bla",
      "cooframe":"equatorial",
      "color":"#ee2345",
      "lineWidth":10,
      "skyObjectList":[
         {
            "name":"A",
            "id":1,
            "ra":"105.69239256",
            "dec":"-8.45235969",
            "data":[
               {
                  "name":"flux1",
                  "value":"11.5",
                  "type":"STRING"
               },
               {
                  "name":"flux2",
                  "value":"2.7",
                  "type":"STRING"
               }
            ]
         },{
            "name":"B",
            "id":2,
            "ra":"105.70779763",
            "dec":"-8.31350997",
            "data":[
               {
                  "name":"flux1",
                  "value":"12.5",
                  "type":"STRING"
               },
               {
                  "name":"flux2",
                  "value":"1.7",
                  "type":"STRING"
               }
            ]
         },{
            "name":"C",
            "id":3,
            "ra":"105.74242906",
            "dec":"-8.34776709",
            "data":[
               {
                  "name":"flux1",
                  "value":"10.5",
                  "type":"STRING"
               },
               {
                  "name":"flux2",
                  "value":"3.7",
                  "type":"STRING"
               }
            ]
         }

]
   }
}