Bug with setblocking commands with text

I have tried setblocking a command with a command inside using this command

setblock ~ ~3 ~ command_block 1 replace {Command:"scoreboard players set @a HasDS 1 {SelectedItem:{tag:{display:{Name:"Dragon Slayer",Lore:["A heavy but powerful sword"]}}}}"}

but it wont setblock I get this error in the command block

[03:26:38] Data tag parsing failed: Unexpected token 'D' at: Dragon Slayer",Lore:["A heavy but powerful sword"]}}}}"

But when I use the same command without the text between the ""
(so I remove Dragon Slayer and A heavy but powerful sword) then it works
I really want to make a video for this but this bug is in my way.