PUT https://people.googleapis.com/v1/contactGroups/19cb37f60aed8000?prettyPrint=false
Host: people.googleapis.com
Content-Type: application/json

{
  "contactGroup": {
    "resourceName": "contactGroups/19cb37f60aed8000",
    "etag": "PFIeYqMwVSs=",
    "name": "test1 modified"
  }
}
