This operation completes the whole sending process for a FileAct message.

POST {{baseUrl}}/alliancecloud/v2/fileact/transfers/:transfer-id/acks

After having initiated a FileAct message transfer, and sent the payload using the signed URL, this endpoint must be used to complete the operation, notifying Alliance Cloud that the payload upload is done. This operation will actually create the FileAct message in Alliance Cloud and give back its message cloud reference in its response.

HEADERS