Output of `bq --format=prettyjson show publicdata:samples` on 2016-04-20.

bq_publicdata_samples_metadata.json

{
  "access": [
    {
      "role": "READER", 
      "specialGroup": "projectReaders"
    }, 
    {
      "role": "WRITER", 
      "specialGroup": "projectWriters"
    }, 
    {
      "role": "OWNER", 
      "specialGroup": "projectOwners"
    }, 
    {
      "role": "READER", 
      "specialGroup": "allAuthenticatedUsers"
    }
  ], 
  "creationTime": "1335915916144", 
  "datasetReference": {
    "datasetId": "samples", 
    "projectId": "publicdata"
  }, 
  "etag": "\"oGMCLvGjZO7RB3oFjn17umMEDU4/MTMzNTkxNjI2Nzk3OA\"", 
  "id": "publicdata:samples", 
  "kind": "bigquery#dataset", 
  "lastModifiedTime": "1335916267978", 
  "selfLink": "https://www.googleapis.com/bigquery/v2/projects/publicdata/datasets/samples"
}