I am creating an ASP.NET Core Web API that stores and retrieves data from a SQL database. One particular endpoint will take a JSON object, however, this particular JSON object will represent the contents of a JSON configuration file. So, the JSON object being sent across the wire will look like this:

{ 
    "userID": 123,
    "jsonFileName" : "aUserConfigFile.json",
    "jsonFileData" : " ...some dynamic json string... "
}

Where the jsonFileData will be dynamic in length depending on user choices. Just imagine a typical JSON file where there is lots of different bits of data in it.

The caller that will be calling this ASP.NET Core Web API will be a C++ app. The JSON object gets stored in a SQL database.

Also, there is the flip side, where I will need to be able to return this same data back to the calling C++ app.

I’ve tried to send the jsonFileData to the API using Swagger, but I get bad request errors all pointing to the jsonFileData string.

I guess my question would be: what kind of text treatment can I use on this string to make it usable to send into the API?