title: How to set a tag for a user in one signal with rest api
body: <p>According to <a href="https://documentation.onesignal.com/docs/data-tags#section-tags" rel="nofollow noreferrer">one signal documentation</a> tag can be set with rest API:</p>
  <blockquote>
  <p>Tags are data attributes that can be added to users via OneSignal SDKs or the Server REST API.</p>
  </blockquote>
  <p>but there is no more data, about how to send a tag with rest api! the link just refer to create notification documentation and nothing more.</p>
  <p>Is it possible to send tag from back-end? Does any one experience this?</p>