Controller: TrackDetailExampleController.cs

using SnapObjects.Data;
using Appeon.ApiDoc.Models.School;
using Microsoft.AspNetCore.Mvc;
using System.Linq;

namespace Appeon.ApiDoc.IDetailTrack
{
    [Route("examples/IDetailTrack/TrackDetail/[action]")]
    public class SetValueAttributeExampleController : Controller
    {
        private readonly SchoolContext _dataContext;

        public SetValueAttributeExampleController(SchoolContext dataContext)
        {
            _dataContext = dataContext;
        }

        [HttpPost]
        public string Example(IDataUnpacker dataUnpacker)
        {
            // Uses IDataUnpack to receive JSON data from the client app.

            // Gets the data of Course and OnlineCourse from the client app.
            var course = dataUnpacker.GetModelEntries<CourseAndOnlineInfo>("course").FirstOrDefault();
            var onlineCourses = dataUnpacker.GetModelEntries<OnlineCourse>("onlinecourse")
                                .FirstOrDefault();

            // Saves data.
            var example = new IDetailTrackerExamples.TrackDetailExample(_dataContext);
            example.Example(course, onlineCourses);

            return "SUCCESS";
        }

    }
}

Refer To

JSON File: TrackDetailExample