How To Try/Catch System Text Json Errors On ASP.NET Middleware

I am presently encountering an issue with catching errors in ASP.NET's JSON serialization middleware. Specifically, with the following code.

        var apiEntity = ModelSerializer.ToApi(entity);
        try
        {
            var ok = Ok(apiEntity);
            return ok;
        }
        catch
        {
            return BadRequest(new ApiError { Message = "Error" });
        }

All runs fine. However, the 'catch' block is never activated, and the wrong error propagates.

I am getting this error:

System.ArgumentException: The JSON value of length 733746981 is too large and not supported.

I want to catch this error so that the correct error is sent. How can I catch this error in the middleware?