static void serialize(ByteBuffer outputBuffer, TtlUpdateSubRecord ttlUpdateSubRecord) {
      outputBuffer.putShort(Ttl_Update_Subrecord_Version_V1);
      outputBuffer.putLong(ttlUpdateSubRecord.getUpdatedExpiryTimeMs());
    }
- - - - - - - - - - - - - - -
|         |                   |
| version | UpdatedExpiryTime |
|(2 bytes)|   (8 bytes)       |
|         |                   |
 - - - - - - - - - - - - - - -
 version         - The version of the ttl update record

 UpdatedExpiryTime  - Time in ms to which the expiry time was updated
ambry-messageformat/src/main/java/com/github/ambry/messageformat/MessageFormatRecord.java