{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7a38c16d1b4585166b141790697afe245a8c93732f8b66f8ce4046b59e47b678",
    "signature": "0xf7e320a7449d55724989bc0d7a67e9d6aac8ba35e6a8af496bc3f2c3dd41e3e103f404815da130d814baa7a5c911917b75cdec0b4bafbe6c86dc169e50dc8f121c",
    "signer": "0x31eba27Ca105bABB3B8590b9A71b07C6d1e7c747",
    "userId": "406716751"
  }
}