1. • "description" (string) - The description of the external source.
     Example: This is a description.
2. • "knowledge_type" (string) - The type of the external source.
     <= 255 characters Allowed value: CUSTOM
     Example: CUSTOM
3. • "name" (string) - The name of the external source.
     = 1 characters <= 64 characters Example: External source XPTO. Match pattern: > \S+
4. • "knowledge_segments" (string) The knowledge segments of the external source, separated by commas. >= 1 characters <= 1024 characters Example: sales,vip
5. • "ring_groups"(array [string]) - The ring groups associated with the external source. Example: ["agents"]
6. • "metadata" (dictionary [string]) A set of arbitrary key-value pairs with additional data about the external source. Example: {"third_party_id":"ded93bd5-d854-4078-839a-9ef5779865a5","source":"KnowledgeOwl"}

"fields" subdivides into:

"name" (string)

"description" (string)