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Web3j decode function from TransactionReceipt

I'm using a testnet on a Geth node whit version 1.8.8-stable, I'm also using the lib web3j whit version 3.4.0.

I deployed a Smart Contract and I also used the web3j wrapper tools to interact whit the contract and everythings look like works...

What I want to do is to decode the information from the new mined blocks, so i subscrive to the new block and I'm able to retrive all transaction from the new mined blocks. Now i know that a transaction is about my smartcontracts becouse the "to" address is the same of the smartcontracts, but how can i recognize the functions that was called???

Sorry for my english, I hope thta someone can help me. Here an example of the TransactionReceipt that i retrive from a transaction hash. Is there any way to understand what function of the smart contract was called???

TransactionReceipt{ transactionHash='0x6583a913786bc0010937806c4a97e8fcac673b1cd9e25c79074df76ae235f4f5', transactionIndex='0x0', blockHash='0x624ed9afc8a45c0b79a1c471fe732d00b813cc476f264e9ada0d3a15a7cf6198', blockNumber='0x5e4cf', cumulativeGasUsed='0x9495', gasUsed='0x9495', contractAddress='null', root='0x3a175640d6654236151ffc9f9afbd9087a656b2b46ead9df5587725a77d3bd7a', status='null', from='0x145107ef476743eaabf8df07cefd47b17d87506c', to='0x70104c2d70145d745ee9308e0ee428e1d96e6142', logs=[Log{removed=false, logIndex='0x0', transactionIndex='0x0', transactionHash='0x6583a913786bc0010937806c4a97e8fcac673b1cd9e25c79074df76ae235f4f5', blockHash='0x624ed9afc8a45c0b79a1c471fe732d00b813cc476f264e9ada0d3a15a7cf6198', blockNumber='0x5e4cf', address='0x70104c2d70145d745ee9308e0ee428e1d96e6142', data='0x0000000000000000000000000000000000000000000000000000000000000064', type='null', topics=[0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef, 0x000000000000000000000000145107ef476743eaabf8df07cefd47b17d87506c, 0x00000000000000000000000061259ec0cfc824e41b5ca2cc64f6453476b165b4]}], logsBloom='0x00000000000008000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000040000000000080020000000008000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010000000100000000000000000000000000000800010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002000000000'}