Doubts about what is the correct way of send an object JSON to server from email to confirm a sign up form

Hi perhaps the title is weird because my english is not perfect. 

The point is i want to send an object to server in format json after the admin see the email to approve it, when the admin decide if ok, in the email i put a link to redirect to url http//:www.myapp.net/signup/ok, so when the admin press on the link the page will redirect to that url and then the object have to be saved in the database, how can i save an object with this approach? I don't know really if this is a good way to do that, I will be attentive if you had some advices. Thank you so much

> The point is i want to send an object to server in format json after the admin see the email to approve it, when the admin decide if ok, in the email i put a link to redirect to url http//:www.myapp.net/signup/ok, so when the admin press on the link the page will redirect to that url and then the object have to be saved in the database, how can i save an object with this approach? I don't know really if this is a good way to do that, I will be attentive if you had some advices. Thank you so much
Your message is extremely confusing. I'm really not sure what you're trying to do. Let's take JSON objects and any other technical details out of the picture until we understand what you want to have happen. I'll take a wild guess; let me know if this is anywhere close:

1. A user sends an email message to an email address to sign up for something
2. An administrator is notified that a new signup request has arrived, or the administrator visits a web page to see the pending signup requests
3. The administrator approves or denies the request
4. Now what would you like to have happen? Perhaps send the user an email message saying their request was approved?

You mentioned a database. What information related to this process will the database contain?