Great post, well written. Definitely took you for a ride.
That "unknown entity" that was discribing a situation like the Truman Show to you was yourself- your subconscious mind. Some would call it God, others just a part of Him.
You are making it all up, everyone is in on the Creation Plan. Hense the smirk on the subconscious' face- it's sheer pride in accomplishment. (pure speculation but that's how I saw it)
Love the way you describe it though! You are a very talented writer.