{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0f24ff228fca3305004dddbd3686f8714f56fb6e004e90437ad4c4583f8dbec3",
    "signature": "0x1f1032e4102248e9b5ef104bbf54abff5dbf6ba9e13df639f8eb26fb10c36051363f4fc9e54384f572f78934eea9969a3db53da31396ac6776db2a0108f2d3bc1b",
    "signer": "0x1369a4A040e641C0584EC5255caBBaB0b4cee85c",
    "userId": "666964391"
  }
}