{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x012a214eb4424a948820a2901537eaf5064abd6565df5fe0d9756054916b9dc3",
    "signature": "0x4ccd7d1495b328287615c091d0f1c3647e36fa3b627092c989bb1e8bc82ee96601f95f75c18714266399c2e02ba38a71cf3e916971b8944537e194787babeb481b",
    "signer": "0x686ca55E05dfb50Fd623b23BA4F03cd000CA9582",
    "userId": "969864347"
  }
}