How to receive incoming json data posted from outside - asp.net-mvc

Question

I want to receive json formatted posted data to my controller. Actually it's used for paypal payment webhook call issue. I already attached a json data example. Please advice me "FormCollection" is good idea to access that json or whats the best practice for this situation?
Json:
{"menu": {
"id": "file",
"value": "File",
"popup": {
"menuitem": [
{"value": "New", "onclick": "CreateNewDoc()"},
{"value": "Open", "onclick": "OpenDoc()"},
{"value": "Close", "onclick": "CloseDoc()"}
]
}
}}
Controller:
[HttpPost]
public JsonResult ReceiveData(FormCollection data)
{
using (var ctx = new db_mydb())
{
}
return Json("ok");
}

Answer 1

Since that data being received is structured and comming in as JSON you should create strongly typed model(s) to store the data.
public class Menuitem {
public string value { get; set; }
public string onclick { get; set; }
}
public class Popup {
public IList<Menuitem> menuitem { get; set; }
}
public class Menu {
public string id { get; set; }
public string value { get; set; }
public Popup popup { get; set; }
}
public class PaypalWebhookModel {
public Menu menu { get; set; }
}
Action should be updated to reflect the desired model.
[HttpPost]
public JsonResult ReceiveData([FromBody]PaypalWebhookModel data) {
using (var ctx = new db_mydb()) {
//...
}
return Json("ok");
}