params = currency=USD&amount=500&internal=0&description=HEY
sig = FE5B4A4A66FEAB0C1216B59C81BC2FD2CA5DC4459D84CF9A7DD8EFE37242E59A

headers are:
Apiauth-Key: sdfsdfdsfdsfy
Apiauth-Nonce: 1000
Apiauth-Signature: FE5B4A4A66FEAB0C1216B59C81BC2FD2CA5DC4459D84CF9A7DD8EFE37242E
59A

currency=USD&amount=500&internal=0&description=HEY
Content-type: text/plain

500 Not a SCALAR reference
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