LogName: Required. The resource name of the log to which this log entry belongs. The format of the name is "projects/ /logs/". Examples: "projects/my-projectid/logs/syslog", "projects/1234567890/logs/library.googleapis.com%2Fbook_log". The log ID part of resource name must be less than 512 characters long and can only include the following characters: upper and lower case alphanumeric characters: [A-Za-z0-9]; and punctuation characters: forward-slash, underscore, hyphen, and period. Forward-slash (`/`) characters in the log ID must be URL-encoded.