Controller: TrackExampleController.cs

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

namespace Appeon.ApiDoc.ISqlModelMapperExamples.Controllers
{
    [Route("examples/ISqlModelMapper/Track/[action]")]
    public class TrackExampleController : Controller
    {
        SchoolContext _dataContext;
        public TrackExampleController(SchoolContext dataContext)
        {
            // Sets the data context.
            _dataContext = dataContext;
        }

        [HttpPost]
        public string Example2(IDataUnpacker dataUnpacker)
        {
            // Uses IDataUnpack to receive JSON data from the client app.
            var newStudent =
                dataUnpacker.GetModelEntries<Person>("student").FirstOrDefault();

            var example = new TrackExample(_dataContext);

            example.Example2(newStudent);

            return "SUCCESS";
        }

        [HttpPost]
        public string Example3(IDataUnpacker dataUnpacker)
        {
            // Uses IDataUnpack to receive JSON data from the client app.
            var newStudent = dataUnpacker.GetModelEntries<Person>("student")
                                            .FirstOrDefault();

            var newStudentGrade =
                dataUnpacker.GetModelEntries<StudentGrade>("studentgrade")
                            .FirstOrDefault();

            var example = new TrackExample(_dataContext);

            example.Example3(newStudent, newStudentGrade);

            return "SUCCESS";
        }
    }
}

Refer To

JSON Files: TrackExample2 TrackExample3