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it is already linked to a Steem Smart Contract, if you have bought cards on the market then you can go on the "manage tokens" page, enter your username and you'll see the amount of tokens you have (and if you have rewards available, they'll show up as well)

Coin Marketplace

STEEM 0.17
TRX 0.17
JST 0.029
BTC 71001.17
ETH 2566.23
USDT 1.00
SBD 2.55