clojure.spec question

[Philos Kim]

How can I define the following spec?

{"id" 1 "name" "john"}

1) The keys of a map must be the string type, not the keyword type.

2) The values must be fixed. Namely, the value of the key "id" must be 1 and the value of the key "name" must be "john"    

[Alex Miller]

#{{"id" 1 "name" "john"}} is a valid spec for that