{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8fb3ebb3f7e9435ff76bc0cf3570fc063ed933790202ec7735ee45353e0453a9",
    "signature": "0x461794b1caf8144a7ba6c61ad6840b043c3f16a9c710c1c080c0d0d1a41b9de91a09e9d01420a3e83b0e8ae67c192c4ef4733b55a43c3219747510907343e9eb1b",
    "signer": "0xBdfceed936610B812ce9c61cD36cEd25E3C02844",
    "userId": "846271474"
  }
}