{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x58e3d6aee779a88d8497bee9933025b390887f51261270543407120c4e93674b",
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    "signer": "0x1f41A2e933113B3030B213309D4CEc9368dD271d",
    "userId": "558476033"
  }
}