You will need the USB to WM-Port lead that came with your Sony Media player. You will also need some electronics knowledge, a resistor of between 10K to 15K, and a power source of 5Vdc, an old USB lead with a FemaleUSB connector on it AND the internet to workout which of the 4 USB conductors is which (5Vdc,D+,D- and GND)
Then bridge(connect/join) the D+ and D- conductors together and connect this join/bridge to the 5Vdc(+ve) with the resistor. The GND can then be connected to complete the circuit.
Sony Media Player > Sony Proprietary Lead > the setup above > 5Vdc power source