Unable to use nested tellraw commands

I tried to create a tellraw command, which when you click it, makes you execute another tellraw command with yet another clickEvent.

This is the command which I've used:
tellraw @a {text:'click here to create a tellraw button which makes you say hi',
clickEvent:{action:run_command,value:"tellraw @a {text:
'click here to say hi',clickEvent:{action:run_command,value:'say hi'"}}}}

Note that I used two different apostrofes (' and ") to make sure it doesn't missmatch, I thought that would cause problems, but it didn't make the command work.

This is what the command block is outputting:
Invalid json: Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 197

I honestly think its a bug, because I'm 99% sure I got the syntax right. If not, tell me!