Is it possible to make this JSON object? How can I?

You can do this using JSON or a JavaScript object instead of an array, like this:

"data" : {
        "1000": "1000",
        "1200": "1200",
        "1400": "1400",
        "1600": "1600",
        "1800": "1800",
}

Note that the square brackets have been replaced with curly brackets. This signifies a JavaScript object, where each “key” has a “value” – for instance, the first key-value pair is "1000" and "1000". If you want to assign this object to a JavaScript variable, you can do so like this:

var data = {
        "1000": "1000",
        "1200": "1200",
        "1400": "1400",
        "1600": "1600",
        "1800": "1800",
}

To access these values, you can use data["1000"] to access the property "1000" – this will return the value "1000". You could use numbers as the values instead of strings, like this:

"data" : {
        "1000": 1000,
        "1200": 1200,
        "1400": 1400,
        "1600": 1600,
        "1800": 1800,
}

Otherwise, you can convert the string values into numeric ones using parseInt() or parseFloat():

parseInt(data["1000"]);

Hope this helps!