To upload a file in DatoCMS, first you need to obtain an upload permission through this API endpoint. The response will contain the S3 URL where you will be able to upload the file with a direct PUT request.
The S3 path where the file will be stored
"/7/1455102967-image.png"
Must be exactly "upload_request".
The URL to use to upload the file with a direct PUT request
"https://dato-images.s3-eu-west-1.amazonaws.com/7/1455102967-image.png?X-Amz-Credential=AKIAJDTXTZHHDUCKAUMA%2F20160210"
Specifies the additional headers that need to be included in the direct PUT upload request