This document defines and specifies the general architecture of the management plane system to manage network slicing in the context of 5G networks. The proposed management plane enables not only intra-domain but also inter-domain end-to-end network slice management and orchestration. To facilitate the design of the modules for slice management, an information model in the context of SliceNet’s network slicing is defined. A cognitive network slice management sub-plane with its inner modules is specified towards achieving cognition-based, machine learning enabled management for QoS and QoE awareness and optimisation, in relation to slice and service management for network operators, vertical users, and other stakeholders with different roles in the 5G system. The management plane, information model concepts including the slice template, the inter and intra domain considerations as well as SliceNet roles are instantiated for the project use cases, namely, eHealth, Smart City, Smart Grid.