{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3865dbb42aa81e29c0a011eaf3364e7889fddf24ee55a007b532a0ac5440461e",
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    "signer": "0x99495e01D85fa00CC970388cC563cb31e0968F8c",
    "userId": "973821285"
  }
}