{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x433a931706bfdf9bcd9b91ada57da5cb1bab595e027336641d72bfa19e3781ff",
    "signature": "0xd4ee8fbd5089a64542a7178901c37ecbd029c920d1df7c84297b1370d5c54954276530c803de4ccad19fb524c6ba76b175f7bc38b1d834d4fdbb6266138415ae1b",
    "signer": "0x45B68786Bd92722D79B63b43778aaA48CbAf871F",
    "userId": "896260194"
  }
}