How to get object id by coordinates received from geocoder?

Question

Yandex

Objects added to the map
function parseJson(url){
$.getJSON(url)
.done(function (geoJson) {
geoJson.features.forEach(function (obj) {
// Set balloon content.
inc_price = obj.properties.price;
itogsum = obj.properties.price;
//obj.properties.balloonContent = itogsum;
// Set the preset for labels with the iconCaption field
if (obj.properties.iconCaption) {
obj.options = {
preset: "islands#greenDotIconWithCaption"
}
}
});
// Add a description of the objects in JSON format to the object manager.
objectManager.add(geoJson);
// Add objects to the map.
map.geoObjects.add(objectManager);
});
}
How to get object id by coordinates like 61.22265466,56.2665665