You likely want to consult an attorney to review your facts and options.
Do you dispute that you owe the creditor something?
If you did not receive notice of the lawsuit that resulted in the judgment, you may be able to file a motion asking for the court to vacate the judgment. However, even if you succeed in vacating the judgment, if you do owe the creditor, the creditor will just simply re-file an action against you (unless something such as a running of the statute of limitations prevent the creditor from re-filing).
If you have $190,000 in equity in your home, you likely are over the homestead exemption (currently, $125,000).
You should consult with an attorney immediately. A default judgment can be vacated in some cases, allowing you to then litigate and/or negotiate the amount of the debt owed down to a more manageable amount for you. Although paying an attorney costs money, the amount of money a lawyer can save you is often well worth it. Also, negotiating a settlement will not necessarily have an adverse affect on your credit, while a default judgment will show up on your credit report for years.
Get yourself an attorney right away. If there is an Order to Show Cause you want to be at the court date no matter what, but make sure to bring an attorney with you. If there is a local legal aid office near you, start with them, they may be able to refer you to someone if they cannot take the case.