{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x22e3ca345c4740f17cc7fec5292467575f0fb84646299fddfb555a00da3a5573",
    "signature": "0x289fbb3792209497ce73f6776ad07219a55d610c6369726a4d7a81b3b4475d631ab5042509ec463c0ee3f9344bcb5240c3c66c580555462e33387fbdd38cbeb41c",
    "signer": "0x09Aad929cFE72962Bf77021998ad06853BB57b93",
    "userId": "702879195"
  }
}