When trying to use tellraw and title commands without quotes on variable identifier it returns a JSON Parse error: "Invalid json: malformed JSON at line 1 column 3". The commands work on Minecraft 1.8.8 and 1.8.9.

Command Used:
/title @a title {score:{name:"PLAYER NAME",objective:"OBJECTIVE"}} DOESN'T WORK
/title @a title {"score":{"name":"PLAYER NAME","objective":"OBJECTIVE"}} WORKS

same as title,
Don't Work
/title @a title

Works
/title @a title

It doesn't matter if used by chat or by command block.(JSON Parser Error)