Efficient way to group JSON data as series by attribute and map attributes to axes

[Neukamm, Dominik]

Hey,

I'm having problems with implementing a scatter chart with the following data 
structure:

[
    {
        "callTs": 1655799367000,
        "operation": "Operation1",
        "sec": 0,
        "message": "Message 1",
        "info": "Additional info for tooltip",
    },
    {
        "callTs": 1655799384000,
        "operation": " Operation2",
        "sec": 96,
        "message": "Message 2",
        "info": "Additional info for tooltip",
    },
    {
        "callTs": 1655803891000,
        "operation": " Operation3",
        "sec": 0,
        "message": "Message 3",
        "info": "Additional info for tooltip",
    },
    {
        "callTs": 1655803934000,
        "operation": " Operation3",
        "sec": 1,
        "message": "Message 4",
        "info": "Additional info for tooltip",
    }
]

How can I group them as individual series by the "operation" value? Is it 
efficient to set data as first dataset and create for each series a new dataset 
with a transform filter?
And how do I bind "callTS" to the x axis and "sec" to the y axis? Do I need to 
specify the dimensions or should this work with setting the encode?


Thanks for your help
Dominik