{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8a768871e0b1dea47f55fc0a7252a4baecf671b7c3fcd268315b40044d313377",
    "signature": "0x42dffe7f2ad0b1f540a296c9ca20cea62f1714e71bc730abc697d38357f70f12270730be2ba1855d6adda0e7dc3e6e3edd319a77e29be7e1d265d48fc09d0b611b",
    "signer": "0x990F2c91Bb2F5E5014BcD365320De09c44E1e1E5",
    "userId": "989231579"
  }
}