I have just created REST API to allow administrator can manage data user from ASP.NET Web API, this is simple to use and have a authentication use OAUTH2 bearer token OWIN.
You can manage data user if he has got token bearer while token is not expired. I set token expired for 15 minutes, you can change it as you as want. Not only text, but also you can upload image file to server and save filename into database via REST API.
A regular license allows an item to be used in one project for either personal or commercial use by you or on behalf of a client. The item cannot be offered for resale either on its own or as part of a project. Distribution of source files is not permitted.
An extended license allows an item to be used in unlimited projects for either personal or commercial use. The item cannot be offered for resale "as-is". It is allowed to distribute/sublicense the source files as part of a larger project.