pass an object from a model driven app to a custom page

sendObjectFromMDAToCustomPage.js

var pageInput = {
    pageType: "custom",
    name: "mea_home_809de",
    recordId:JSON.stringify({prop1: "Hello,", prop2: " World !"})

};
Xrm.Navigation.navigateTo(pageInput).then(
    function success() {
        // Run code on success
    },
    function error() {
        // Handle errors
    }
);