{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf4d745984734ea9624d09b04a45f8d8fbc6bc7be75c56f5e7d2da6410cf65856",
    "signature": "0x353dfe85c375d837e6f9e923eda5c8018777b9abbfa0c13d049d8bb344fc73fd5a0a7de5903297f7523d8c16e92fad0eaea8b2bc158e87fcd1e7ef45e8982d7a1b",
    "signer": "0x918eC7857CA040D55395d7dd88187D785daFe6c8",
    "userId": "777079496"
  }
}