This datapack will implement NBT Nametags into Minecraft.
Basically what this datapack does is let you change some basic NBT data on mobs like if the Ai is enabled or not.

In order to use this datapack first download it, extract the zip file and put it into the datapack folder of your world. Once you do that you should either restart your world or use the "/reload" command. Now, to use it rename a name tag to one of the names in the table below and right-click a mob with it. If you want to turn off the NBT nametag feature if, for example, you have this on a server to add decorations with mobs then just type "/scoreboard players set @a NBTnametags 0" and this will disable the NBT Nametags datapack. If you want to enable it later just change the 0 to a 1. You can also change who is not allowed to use the datapack by changing the @a to a different target selector.

Enable	Disable	What It does
AI	NoAI	Enables/disables AI for a mob
Gravity	NoGravity	Enables/disables Gravity for a mob
Silent	NotSilent	Makes a Mob Silent/make noise again
Fire	NotFire	Sets a mob on fire/Puts out a mobs fire
Invulnerable	NotInvulnerable	Makes a mob Invulnerable/Not Invulnerable
Baby	Adult	Makes a Mob a Baby/Adult
InLove	NotInLove	Makes a mob in love/Not in live