{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3cbc36fd1c4efcab745b494c7578c4be47c16941c288860e3fbc3cad6895107e",
    "signature": "0xbf167707123b2f57c2f5279d62e68d87e035a4cbb4d09e1330b8b8172c4d7e622cb1e801a6fa2f54f08c9e3e1705af31da4fe77639f1a43f55046dfea8450af11c",
    "signer": "0x2d9dE0031960aD6f53e402E622254d2AeBc7307D",
    "userId": "787599159"
  }
}