Custom keyboard shortcuts for My Linux Mint. Go to Settings - Keyboard - Shortcuts - Custom and add a shortcut to call these files and set your keyboard combinations.

addLcurly.sh

#!/bin/bash
# This command sends this text on active window: { 
# Go to settings - keyboard - shortcuts and add a shortcut to call this file and set your keyboard combinations.
windowid=$(xdotool getwindowfocus)
sleep 0.2 && xdotool windowactivate --sync $windowid type '{'

addRcurly.sh

#!/bin/bash
# This command sends this text on active window: } 
# Go to settings - keyboard - shortcuts and add a shortcut to call this file and set your keyboard combinations.
windowid=$(xdotool getwindowfocus)
sleep 0.2 && xdotool windowactivate --sync $windowid type '}'

pasteImportantText.sh

#!/bin/bash
# This command sends `string` value.
# Go to settings - keyboard - shortcuts and add a shortcut to call this file and set your keyboard combinations.
string="ImportantText"
delay=0.05 # Delay between character inputs in seconds
sleep "0.5" # initial wait, without this beginning text is missing
for char in ${string}; do
    xdotool type "${char}" && sleep "${delay}"
done