{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xde58ed8d4602fe2c5517c656f4eb147eea185b35f196c5142a40bc69fdea1be7",
    "signature": "0x7ae8272d8063101d8971500e8528a79c5efaebac3a76dcaa1e718cbee8174ab9006cd68ea17121c285a2f17d61c586d4a9b4805af8a24120e7bb792f1f0264651b",
    "signer": "0xAf65a55Abda4Efb47FE4C209a38ecFfD18aEF0Dd",
    "userId": "53764968"
  }
}