{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6fb4ab15e504672aea9a695a220365420eadeb48c7de0ee79082c6c68921486b",
    "signature": "0x95583ee58bae9d6c84f020cae993dc775968351855e5061031ffaef97432037652120da8bc70f70253daf01a783045f3cc362255ea616456c6ffca1dcc325c3c1c",
    "signer": "0x0D29e890aa88a8dd37e712bbFA353Db83b8B5D7f",
    "userId": "547890227"
  }
}