I'm connecting to a testnet using a Geth node running version 1.8.8-stable,
and also I'm using the web3j lib version 3.4.0.

I deployed a Smart Contract and also used the web3j wrapper tools to interact with the contract and everything looks like working.

What I want to do is to decode the information from newly mined blocks. i.e. I subscribe and I can retrieve all transaction from the newly mined blocks. 

I know that a transaction is about my smart-contracts because the "to" address is the same in smart-contracts. But how can I recognize the functions that were called???

Sorry for my English, I hope that someone can help me. 
Here an example of the Transaction Receipt that I retrieve 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'
    }