Set locale-specific content overrides for a notification template. Each element override must reference an existing element by ID. Only supported for V2 (elemental) templates.
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
Notification template ID (nt_ prefix).
Locale code (e.g., es, fr, pt-BR).
Locale overrides applied.
Shared mutation response for PUT content, PUT element, and PUT locale operations. Contains the template ID, content version, per-element checksums, and resulting state.