I'm assuming that you have Parity installed and have the accounts set up.
Things you'll need:
Contract Address: 0x55d34b686aa8C04921397c5807DB9ECEdba00a4c
Start Block: 3903900
Required Gas Limit: 200000
Maximum Gas Price: 50 Gwei ( 50000000000 )
Your account password: Required to unlock the account & send the transaction
Step 1: Fill the details ( as shown in the images below )
Step 3: Unlock the account and send the transaction
It'll take a while for the transaction to go through. Check the details on etherscan.
Important: Do not mess with the Gas Price & Gas Limit
The contract won't execute. Here are some links to failed contracts:
https://etherscan.io/tx/0xcc20794f073d11052d4dc18b2e13aad4bff248b1e63e3fc3c547c2b91a30b863
https://etherscan.io/tx/0x057806741563e339c79478de28e19949d6a584d286448a9ab8daff77e4c0c95e
https://etherscan.io/tx/0x52cf83532d780d11d7bd8c662c8924401d3778f564d8b96b39230a0caf84977e