In this demo, we present a Cloud Radio Access Network (C-RAN) prototype based on the Open Air Interface (OAI) platform, which enables efficient coexistence of Internet of Things (IoT) and Enhanced Mobile Broadband (eMBB) slices, sharing the same Radio Access Network (RAN). Our prototype aims at efficiently distributing the spectrum resources among multiple slices, while considering the inputs from a northbound Software Defined Network (SDN) application. By using real smartphones and IoT devices orchestrated by the BeC 3 (Behaviour Crowd Centric Composition) framework, we run experiments on stage to validate the feasibility of our prototype in configuring IoT and eMBB slices in real-time, while considering triggering events generated by the IoT network.