Quotes ignore brackets

//ads -- adsterra.com -- native banner
?>
I am trying to place a sign to copy the use of Essentials' [Buy] Command, using this command:
/setblock ~ ~1 ~ wall_sign 5 replace {id:Sign,Text1:"[Buy]"}
But that command gives me this when it is executed
It seems as if even though the brackets are in Quotes, the command is seeing them as an exectuable string. Is there a way to bypass this?
Pictures about "Quotes ignore brackets"



Do you put brackets around quotes?
Here are some of the most common uses for brackets in quotations: Use square brackets to include words within a quote that are not part of the original quote. For example, if a quoted passage is not entirely clear, words enclosed in square brackets can be added to clarify the meaning.When quoting When do you use brackets?
Brackets, sometimes called square brackets, are most often used to show that words have been added to a direct quotation. Sometimes, when quoting a person or document, adding a word or two is necessary to provide enough context for the quote to make sense.Using Air Quotes wrong your entire life - Air Quotes
Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.
Images: Madison Inouye, Mikechie Esparagoza, Bich Tran, Sy Donny