id.sonyentertainmentnetwork.com/id/managment
So here are the instructions, it should take you only 10 minutes or less:
1. After you bought the cracked acc, use PC or Mobile and login with it on https://id.sonyentertainmentnetwork.com/id/management/#/p?entry=%2Fp
2. It should look like this https://i.screenshot.net/d8o12hq
3. Scroll down and click on Other Settings 
https://i.screenshot.net/xkjnouv
4. Then click on Playstation Systems https://i.screenshot.net/106w9he
5. Then click on Deactivate All https://i.screenshot.net/o8jrjsm
6. Now go on your PS4, go to the "Settings>Login Settings>User Managment".
7. Click on Create A New User and login with the cracked acc. It will automatically activate the acc on your PS4
8. NOW comes the important part. Restart your PS4, Move again on a PC or Mobile. Go to https://store.playstation.com login with the cracked acc.
9. Now is the last part, click on the Download List https://i.screenshot.net/96dkdud
id.sonyentertainmentnetwork.com/id/managment How to use it? id.sonyentertainmentnetwork.com/id/managment
10. Download the games you want, once you click Download To Your PS4 it starts in few seconds. https://i.screenshot.net/v27y7b8

Have fun !!
id.sonyentertainmentnetwork.com/id/managment