{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4469b0ee5c45a043dd0e29c2ceb53d2bf65dec8ce16477829a8c7058d6254292",
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    "signer": "0x7007B05fdE5305e23af69AA5BAEb803cc6311b7E",
    "userId": "407916583"
  }
}