Server crash command

Hey all, I was really creeped out by this command that crashed a Realm once I executed it. It gives you a mob spawner and once you place it, your Realm is kissed goodnight and... IDK what to do. !!! THIS MIGHT CORRUPT YOUR WORLD AND WILL CRASH YOUR REALM/SERVER !!!

Get a block that crashes your Realm/World

give @p minecraft:mob_spawner 1 0 {BlockEntityTag:{MaxNearbyEntities:32s,RequiredPlayerRange:12s,SpawnData:{id:"item",Item:{id:"emerald",Count:64b,Damage:0s}},MaxSpawnDelay:1s,MinSpawnDelay:1s,SpawnPotentials:[{Entity:{id:"item",Item:{id:"emerald",Count:64b,Damage:0s}},Weight:0.25},{Entity:{id:"item",Item:{id:"diamond",Count:64b,Damage:0s}},Weight:0.25},{Entity:{id:"item",Item:{id:"gold_ingot",Count:64b,Damage:0s}},Weight:0.25},{Entity:{id:"item",Item:{id:"iron_ingot",Count:64b,Damage:0s}},Weight:0.25}]},display:{Name:"Spawner of Riches"}}