ssqc and csqc are separate and independant. entities in ssqc do not exist in csqc unless you explicitly create them (SendEntity, deltalisten, or other writes/prints/etc).
If you want to parse the maps entity section clientside, you can find an example of this in my purecsqc mod (CSQC_WorldLoaded is called once the worldmodel (and thus the entity lump / .ent file) have actually been loaded, and the qc then calls spawn.qc:SpawnEntities which does the actual work in purecsqc).