Да, это словарь JSON.
{
"aps":
{"alert":"test",
"badge":1,
"sound":"default"
},
"Value1":info,
"Value2":3,
"myDict":
{
"key1":"val1",
"key2":val2
}
}
И для доступа:
- (void)receivedRemoteNotification:(NSDictionary *)userInfo {
NSDictionnary *myDict = [userInfo valueForKeyPath:@"aps.myDict"];
}