{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x602148b049a77b4f3ea45daf36aa644dbb2da58af835f9d8e4545007a9e2f787",
    "signature": "0x7a429c13e413d0ddca00616feab8e9358cefb904d4307f21ae2ff06192d56f663b8af033cef1e0deb45e4b64bd9a88d872adad5055eaf7f7ed41f42c469b8e5a1c",
    "signer": "0x9Bb435F20E92A2A14c15eBd52B68eb305FB14e67",
    "userId": "858244647"
  }
}