/data merge entity @e[type=armor_stand,limit=1,sort=nearest] {CustomName:"Test"}
or
/data merge entity @e[type=villager,limit=1,sort=nearest] {CustomName:Willam}
shows what's in the attachment but does nothing else
/data merge entity @e[type=armor_stand,limit=1,sort=nearest] {CustomName:"Test"}
or
/data merge entity @e[type=villager,limit=1,sort=nearest] {CustomName:Willam}
shows what's in the attachment but does nothing else
CustomName
uses TextComponents now.