curl --location --request POST '/api/apps/trade/v2/merchant_audit_callback' \
--header 'Byte-Authorization: SHA256-RSA2048 appid="ttxxx",nonce_str="DC10180A100073E70A48F195DA2AF2E6",timestamp="1623934869",key_version="1",signature="nwd1L3wCX+01/TVTkILeovF1DtYeghC1VHjrcjTHVkh7+gRaONEQkC2Y72Mw8JdSnIyeAtyp/pDHzyKGywjVqv5+JOBEhQG1/pvwNHN49wD26qg3AJL4hXw0fMJSRiTQEV1MszwDLuaabvo/qM9OXL9KyYiEPwVJqYtzmho4cHXT6mYgzNOW1xt5d7RDf4QO74JI3i4dtk9Uj8svJTrrBabML6AUcqcx2OP/7xukdaUgPdPf+IqmMG6GC4n52LUDogcL5n/osLdfHg9l6kW5gDcDjBfNDaggz07QMPHGdVao7pnQ2ub7VqcFIuY6Q3cBL7ndQdDGKrv+WBy5Q90QjQ=="' \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data-raw '{
"out_refund_no": "1123",
"refund_audit_status": 2,
"deny_message": "不同意退款",
}'