Defense Unit:

admincheat spawndino "Blueprint'/Game/Mods/TamableTank/TameTank_Character_BP.TameTank_Character_BP'" 1 1 1 35

Summon Defense Unit Item (For regular maps, TheIsland, Ragnarok, TheCenter):

admincheat giveitem "Blueprint'/Game/Mods/TamableTank/PrimalItemConsumable_SpawnTameTank.PrimalItemConsumable_SpawnTameTank'" 1 1 false

Summon Defense Unit Item for SE:

admincheat giveitem "Blueprint'/Game/Mods/TamableTank/PrimalItemConsumable_SpawnTameTankSE.PrimalItemConsumable_SpawnTameTankSE'" 1 1 false

Summon Defense Unit Item for Aberration:

admincheat giveitem "Blueprint'/Game/Mods/TamableTank/PrimalItemConsumable_SpawnTameTankAB.PrimalItemConsumable_SpawnTameTankAB'" 1 1 false

(It doesn't matter which item you spawn in, it's just different crafting recipes for the Official maps.)