curl -i -X POST -H "Authorization: Bearer $(gcloud auth print-access-token)" -H "Content-Length: 0" -H "Content-Type: text/plain" -H "x-goog-resumable: start" -H "x-goog-meta-key1: value1" "https://storage.googleapis.com/${BUCKET_NAME}/test-meta-key.txt"
HTTP/2 201
content-type: text/plain; charset=utf-8
x-guploader-uploadid: [censored]
location: https://storage.googleapis.com/$BUCKET_NAME/test-meta-key.txt?upload_id=[censored]
content-length: 0
date: Thu, 11 Mar 2021 01:57:02 GMT
server: UploadServer