{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc5014bbeb72753fe0ca9ef57098c4a471a5bf737160efcfd984a4346711e23b2",
    "signature": "0xe74ba690273581efbfcc4b677fb3b5badacecf041091764f3ecaf9a76d26b1201cac5bb972ab6ed5f1ea0fe0c98e37787c12bf9b50a1d38f56fa778682105aef1b",
    "signer": "0x4bab5Cd522B53b8B987980041e9789631B6a50C1",
    "userId": "627782178"
  }
}