{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x512c2b7951070c132c6b951a2d8317229fa2f6e3f5c4366b46daff9670f3c6ef",
    "signature": "0xaffb01101583fb4927fdad2c077e932d2c42d651edfc0d135bdbebcbd8457ae976eb3470a9987e11f93dca6d8b3e3c6578364a0ea94cffd37ffe0102bf726f3c1b",
    "signer": "0xBEaec7EA4EfE5d557A3Fe09cfE57d4c86472aA0c",
    "userId": "262766003"
  }
}