{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x70ea4a58f0fb1f7364eb7b16c661cb40cf9b003419d8cdaf4a73e686b7521d77",
    "signature": "0x46d7b06caa0510b09159cb6884e5b3f24831afa4858ca09a312a5204de2820890841b24d2cd378796fe249335143cdce191c78afc7a4ca87484542393ba636b21c",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}