Hi Mr nightmare. Sounds like a nightmare is happening in your wallet :(
I am assuming you are talking about the Steemwallet Mobile app for iOS or Android.
What the app does is that it stores your "Private Key" for your "active authority" (also called your Active Private Key) in a so-called "wallet file". Because your private key is your access to the funds the app does not store this private key in plaintext. Instead it asks you to pick a "password" or "passphrase". This password/passphrase is used to safely encrypt your "wallet-file" which can contain 1 or more accounts private keys.
So the passphrase/password used for encrypting your wallet-file is not the same (or should not be) the same as your Steem password or your Steem Active Private Key.
I will look some more in a next update to make this very clear for everyone. It is like the "passcode" to your vault, which stores your private key.
Ps the "Json Token of I" I not complete get, but I think it is the error you see when you try to unlock your wallet with a wrong password/passphrase, as it then tries to use that 'passphrase' to unencrypt your wallet file, but it fails. JSON is the file structure of the wallet-file, so if it unencrypts succesfully it should return parseable JSON again, and not error.
All hope is not lost however. The app also mentions that it should not be the ultimate store for your private key, so I hope you still have your 'active private key' for your account backed up elsewhere, or you can retrieve it here from your "permissions" page right on Steemit.com using your password or owner key.
If you really can't think of the password you used for the wallet-file, you can simple "factory reset" the app by going to the settings menu of the app: Tap the Steem-swirls logo next to where it says "Steemwallet". Then factory reset. Confirm (it will delete your wallet.json file). Then you can "hard exit" the app manually, depending on your operating system you need to swipe to kill from last used apps.
Then restart the Steemwallet app, add your account to monitor, then try to send something and make up a safe passphrase to encrypt your wallet file. Then add the 'active private key', then it asks again for your just setup 'passphrase'.
Let me know how it goes. You can also find me elsewhere for direct messages.
kr roeland