/setblock ~ ~1 ~ minecraft:mob_spawner 0 replace
{SpawnData:{id:"FallingSand",ExitPortal{x:1300,y:196,z:1292},
Block:redstone_block,Data:0,Time:1,DropItem:0},
SpawnCount:1,RequiredPlayerRange:100000,MinSpawnDelay:20,MaxSpawnDelay:20,MaxNearbyEntities:1}
It should be:
.
That should fix it.