AssetOperation

A single operation to create an asset. Supported asset types are YoutubeVideoAsset, MediaBundleAsset, ImageAsset, LeadFormAsset, LocationAsset, and ImageAsset. TextAsset can be created with an Ad inline, but it can also be created apart from an Ad like other assets.

JSON representation 
{
  "updateMask": string,

  // Union field operation can be only one of the following:
  "create": {
    object (Asset)
  },
  "update": {
    object (Asset)
  }
  // End of list of possible types for union field operation.
}
Fields
updateMask

string (FieldMask format)

FieldMask that determines which resource fields are modified in an update.

This is a comma-separated list of fully qualified names of fields. Example: "user.displayName,photo".
Union field operation. The mutate operation. operation can be only one of the following:
create

object (Asset)

Create operation: No resource name is expected for the new asset.
update

object (Asset)

Update operation: The asset is expected to have a valid resource name in this format:

customers/{customerId}/assets/{asset_id}