curl \
 --request PUT 'http://api.example.com/api/users/update' \
 --header "Content-Type: application/json" \
 --data '{"firstName":"string","lastName":"string","city":"string","street":"string","year":42,"month":42,"day":42}'

curl \
 --request PUT 'http://api.example.com/api/users/update' \
 --header "Content-Type: text/json"

curl \
 --request PUT 'http://api.example.com/api/users/update' \
 --header "Content-Type: application/*+json"