{
  "manageEntity": {
    "action": "Save",
    "entityId": "573138457",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xcda261f6d5942888bae8d0e88daf280f3552970d994dc8237b9f680e1d26f37f",
    "signature": "0x859a96def5431259f8734a95f46ee03fa9fa68579016ba2b6fb1c84094f260f024f0c5a600d9fddf471b9d66f42d4be784860af72fa1fea7e6c50ffcd2b305951b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}