on snapshot 15w47c the /title command and /tellraw command dont work

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What I expected to happen was something to say hi on the screen colored yellow from /title command and some words in chat to say hi colored blue but they said json malforme something at line 1 coloum 1
Describe what you thought should happen here
something to say hi on the screen colored yellow from /title command and some words in chat to say hi colored blue
What actually happened was...:
Describe what happened here
it said malformed json at line 1 coloum 1
Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
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