{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd8d22c0da3daffb839846579f840e2d16d00f324df395751c6ea5027962ebf9c",
    "signature": "0x1a87c6e00f4788c9608f95e4d99c9b2bf67f511be055a84dbfc8059855ba79670f2e394e5a1820c68d8b93fb0f6a3731a24b932ea21bc3e726244cd42f481c721b",
    "signer": "0x52BeffD1D714c5070669ac0f0c3b043Af8ceb0A4",
    "userId": "387855363"
  }
}