You can't customize mob Spawners

There is a possibility to give or to place a spawner in minecraft using a command or a command_block.

This seems to work fine, but when you want to customize your spawner it doesn't seem to work!

Variables like:

• Delay
• MinSpawnDelay
• MaxSpawnDelay
• RequiredPlayerRange
• MaxNearbyEntities

They all doesn't seem to be customizable. For example:

The command: 

/setblock ~ ~-1 ~ spawner{SpawnData:{id:zombie}} replace

gives you the exact same result as:

/setblock ~ ~-1 ~ spawner{SpawnData:

{id:zombie}

,SpawnRange:5,Delay:10,MinSpawnDelay:10,MaxSpawnDelay:20,RequiredPlayerRange:99,MaxNearbyEntities:6} replace

The spawner just spawns a zombie ones like every 20 seconds or so and the player still must be in close range. 

I've played with the variables a little bit and nothing seems to be customizable.

I've tried the commands:

• setblock spawner
• give spawner
• with a command block 

They all don't change anything about the spawner.