Create a child organisation node in the Fintecture Console. Organisation nodes form a hierarchical tree structure for managing your organisation's entities and access control.

When using OAC token authentication, the parent organisation node defaults to the token's organisation node if not provided in the request body. This allows creating child nodes directly under the token's scope without explicitly specifying the parent.

🔒 External clients call this endpoint with an OAC (Organisation Access Credentials — ⚠️ Beta) access token carrying the organisations:write scope.