Hi,
I remember I have already answered this question once somewhere, but I cannot find the link. Anyway: In the old version, I defined a macro for each attribute and used "Generate Data by User Specification" to create a one-line exmple set. This, admittedly was ugly. As of RA 1.1 you can directly POST CSV, Excel, or XML files to the Web service. Check this out:
http://youtu.be/AiTQtIRNIVoBest,
Simon