{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8cfea5246a5b72d65b86886c9169c3a7f212d92c4636d1e1c0bc9bfe1b627b9b",
    "signature": "0x8980a5409fb557c22c254dd3817ae0c1897e632d5be0dc247459266713fa141d073c77b6a5616f805c87c4578d627f647ec59ed2d4c801cc5c68fc630d3bbe511b",
    "signer": "0x6253a5487Ca5ADB465668B7122aa0cea88950f8D",
    "userId": "375002735"
  }
}