Appdelegate.m

...
- (BOOL)application:(UIApplication *)application
            openURL:(NSURL *)url
  sourceApplication:(NSString *)sourceApplication
         annotation:(id)annotation
{
    // imnotyourson://article/123, imnotyourson://user/123
    if ([url.scheme isEqualToString:@"imnotyourson"]) {
        NSURLSessionDataTask *task = [[NSURLSession sharedSession] dataTaskWithURL:url completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
            dispatch_async(dispatch_get_main_queue(), ^{
                GenericItem *item = [NSKeyedUnarchiver unarchiveObjectWithData:data];
                [self navigateToDetail:item];
            });
        }];
        [task resume];

        return YES;
    } else {
        return NO;
    }
}
...