{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd56d186c821e22db1201a30f533ea31be7b72bc7f7f008162ffb97af6d9c2964",
    "signature": "0x47eab048deee1586c568d14889b17a33948904cb4a3410a7aa2b2eb356dff33e6691ac8ed2a3b630d595d35eec239bba39f11f325e85d3aa5998d2646262ec651b",
    "signer": "0xEc97D192Db8a8Ceb218C19d4789628453A691ac4",
    "userId": "360503006"
  }
}