{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb8a63c0c2cb3c8f2833ace5fc61c2e746224ab8fd14119f295f6d29f7d8e60aa",
    "signature": "0x85ac775735c5cece7c8ee67bf0336bfc16e29044bf94f85b91f18ee4f7281ff97ab6677129b4c164143416432003f188424285731e54d9693dfea08e2a225ab71c",
    "signer": "0x1b8DcAD5ED837233989D4f246852f5aAdf1f61eA",
    "userId": "400923052"
  }
}