Things are getting a little tricky

I am working with nodejs, but only should need some javascript knowledge for this one.

Process: 1. I receive one input in the form of a String from the user.

                2. I capture that information and also the date (the time is not necessary) and then I call another view.

               3. This view consists of a table populated from mongoDB with a varying number of Objects, each with three properties. {firstname, lastname, address}

                4. The user then selects ( Opinions on the best way to select multiple items appreciated) 1-many objects from that table.

                 5. I would like to create and store a complex Object consisting of 3 things....., The string, the date, and an array? or object? of all the items selected.

Does this make sense?
Thank you, any partial answers would even be appreciated because I will be working on it. 500 points, I would give more if i could because im stuck here.
Thank you