How to Customize a Model Validation Response which results in an HTTP 400 Error Code?

In .NetCore API project, I'm using following line of code in action to check and throw error:

if (!ModelState.IsValid)
      throw new Exception($"Invalid input model") ;

But seems, it's not reaching to the throw part and returning 400 status code with following api response:

{
    errors =     {
        Name =         (
            "The Name field is required."
        );
    };
    status = 400;
    title = "One or more validation errors occurred.";
    traceId = "00-19041551252dec44959314a355f38eb7-76202d713d3a0c4f-01";
    type = "https://tools.ietf.org/html/rfc7231#section-6.5.1";
}

Is there any way to customize this response model?