/v3/marketing/busifavor/stocks创建商家券接口签名失败

{"code":"SIGN_ERROR","detail":{"detail":{"issue":"sign not match"},"field":"signature","location":"authorization","sign_information":{"method":"POST","sign_message_length":666,"truncated_sign_message":"POST\n/v3/marketing/busifavor/stocks\n1588831998\n5Afb2B5p7FhozHSWTIcPKoONS2sMw96M\n{\"stock_\n","url":"/v3/marketing/busifavor/stocks"}},"message":"错误的签名，验签失败"}