{
  "manageEntity": {
    "action": "Save",
    "entityId": "339583490",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1da2819378c60e4fa392afac3dbe1770ccbec2a21b4fb34f72bf4542a6f72de9",
    "signature": "0x79e12ac288facf0789457082d525e37945dc53b9d564b94107ba859877d68f114bbccc7502ad25919f331a8d007ed284749d4e1c7920d385d9869647534475511b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}