block.io - any hope of retrieval with the data I have - if I figure out my PIN eventually?

Hi, so I totally missed the ongoing block.io shutdown and also didnt figure out what my pin is yet, but I think this is just a matter of time as I have a rough idea.

I managed to get this here:

"user_key": {
"public_key": "[Redacted]",
"encrypted_passphrase": "[Redacted]",
"algorithm": {
"pbkdf2_salt": "",
"pbkdf2_iterations": 2048,
"pbkdf2_hash_function": "SHA256",
"pbkdf2_phase1_key_length": 16,
"pbkdf2_phase2_key_length": 32,
"aes_iv": null,
"aes_cipher": "AES-256-ECB",
"aes_auth_tag": null,
"aes_auth_data": null
}
}
and wonder if that is enough, if I figure out my PIN, to eventually retrieve the Coins. My understanding is that with the PIN i can deencrypt the passphrase and then get my private key but apparently there is a 2nd private key - is that key somehow reconstructible / contained. I also have the public address and some transaction IDs. As it would be super frustrating to figure out the PIN and then find out I still can't access the wallet, I'd be very greatful if someone could tell if it is hopeless or not. Thank you very much