{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2ebf554660d39ecfb5e19deeeaec91e460f8666cdf374b214f679c81bea6e214",
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    "signer": "0xA43473b76c403EDCeA8AF401394F766b725Ab463",
    "userId": "229582519"
  }
}