Modding Help how to change files

i want to change something inside some files, i think i can do it with .patch but i know only how to add stuff but not delete or change.

 

https://json-patch-builder-online.github.io/
generate a patch by putting what you want to change on the left and how you want the final version to look like on the right.
start (left box):

Code:

{
    "Message":"",
    "Message2":"Hi"
}

end (right box):

Code:

{
    "Message":"Hello World!",
    "Message3":"Bye"
}

patch (bottom box):

Code:

[
    {
        "op": "remove",
        "path": "/Message2"
    },
    {
        "op": "replace",
        "path": "/Message",
        "value": "Hello World!"
    },
    {
        "op": "add",
        "path": "/Message3",
        "value": "Bye"
    }
]

 

ty very usefull!