Get Raw Transaction Hex

Raw Transaction Hex for Txn Hash: 0x646c9ea20a19b11be247acfdc4a8beed18ee711aff024ad75434b83e7c7f6994 
                            Returned Raw Transaction Hex : 

0x6af889828173b8846bf6a42d00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001459c1300000000000000000000000000000000000000000000000000000000005f4f7a0000000000000000000000000000000000000000000000000000000000000002