How to make a rest API Call post with multiple parameter, xCode

I am trying to have an API Call post. I can use this post command however my issue is that I have multiple parameters such as, Name, phone number, email, and multiple other private information. I have tried this method in order to get it to work but have not been successful. Thank you in advance for any help!

GET Request

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
[manager GET:@"http://ift.tt/1dQP7EC" parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
    NSLog(@"JSON: %@", responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    NSLog(@"Error: %@", error);
}];

or

POST URL-Form-Encoded Request

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
NSDictionary *parameters = @{@"foo": @"bar"};
[manager POST:@"http://ift.tt/1dQP7EC" parameters:parameters success:^(AFHTTPRequestOperation *operation, id responseObject) {
    NSLog(@"JSON: %@", responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    NSLog(@"Error: %@", error);
}];