put https://api.thethings.io/v2/me/resources/description/
There is a special resource called "description" that can contain meta data about the thing. This meta data could be the name of the thing (chosen by the user), geocoordinates, JSON objects and any other data the developer wants to put there.
This resource is accesible the same way as all the resources with get and put requests.
Before you modify this resources, you have to get the actual description value, change the properties you want to modify and then store the complete document again.