post
https://api.split.io/internal/api/v2/schema/ws//trafficTypes//attribute:bulk
Bulk upload attributes. If an attribute already exists, it is replaced. This endpoint accepts a JSON upload. If there is an issue parsing any of the attributes, an error is thrown and attributes with issues are sent back with error messages. The attribute ID must start with a letter followed by a combination of dashes (-), underscores (_), letters (a-z A-Z), or numbers (0-9).