{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x38bc497387474f03383b63f360a2074e76fbe37b43e94851b2d6cb3fbdbaf7fb",
    "signature": "0x3fa2f818d0ca90fa644b29be884e6000abb1df44e5c3dc49359960b3a2afd3cb169b3f86e029c7f7021e61eded7e296f9ca5b09f161bb724bce14c473f2d53081b",
    "signer": "0xFa2d4C2518C0BB689b437d226912F37Cd9d98A23",
    "userId": "61154"
  }
}