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The steps to set asset values using Cloudkit Web services are:Request URLs for uploading asset data.Upload the asset data.Set the asset fields in records to the uploaded data.I am getting the URL from step 1.Then I am supposed to upload my asset using the given url ($[ASSET_UPLOAD_URL])The Cloudkit reference document gives a curl command as an example:curl -X POST $[ASSET_UPLOAD_URL] -d@[ASSET_FILE]The problem is that when I am using this command in the Terminal, I have a "bad request" as a response.But If I use the same command without the asset file, it kind of succeed with the following answer:{"singleFile":{"size":0,"fileChecksum":"AW2cWT2PxzWixMKuuNMTHJ8CJ3sH"}}Has anyone manage to send assets using the Cloudkit web services ?