{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4bf1016b814c5efd2f5afa8e0851725fc5ed5c7e8a43e18b225ec4ae75ed2b0e",
    "signature": "0x34b473887fe15f3cf078173ed8c3c68483d92f2e0d0759c25d222aef5e98bfb41eb7f31d53f39452a5058f592bd571dad3fe550458a4f5510ac9c5a082cbc7721c",
    "signer": "0xA3cEd4452Ec88415B96DE1F0BDfc3a358cE048b5",
    "userId": "387447420"
  }
}