OperationMetadata

Metadata about a long-running operation.

JSON representation 
{
  "createTime": string,
  "endTime": string,
  "target": string,
  "statusDetail": string,
  "errorDetail": string,
  "verb": string,
  "requestedCancellation": boolean
}
Fields
createTime

string (Timestamp format)

Output only. The time at which this operation was created.

Uses RFC 3339, where generated output will always be Z-normalized and uses 0, 3, 6 or 9 fractional digits. Offsets other than "Z" are also accepted. Examples: "2014-10-02T15:01:23Z", "2014-10-02T15:01:23.045123456Z" or "2014-10-02T15:01:23+05:30".
endTime

string (Timestamp format)

Output only. The time at which this operation was completed.

Uses RFC 3339, where generated output will always be Z-normalized and uses 0, 3, 6 or 9 fractional digits. Offsets other than "Z" are also accepted. Examples: "2014-10-02T15:01:23Z", "2014-10-02T15:01:23.045123456Z" or "2014-10-02T15:01:23+05:30".
target

string

Output only. The name of the resource associated to this operation.
statusDetail

string

Output only. Human-readable status of the operation, if any.
errorDetail

string

Output only. Human-readable status of any error that occurred during the operation.
verb

string

Output only. The verb associated with the API method which triggered this operation. Possible values are "create", "delete", "update" and "import".
requestedCancellation

boolean

Output only. Identifies whether cancellation has been requested for the operation. Operations that have successfully been cancelled have google.longrunning.Operation.error value with a google.rpc.Status.code of 1, corresponding to Code.CANCELLED.