{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x489cb50675d58b3480b964a606e5b515dd646bcd5a13ef2bdf4dbb745b825ccc",
    "signature": "0x8979a4ea7228f722af5b9f5b17fe55a870e7325371293c278d168d71f32e35d6249d55ed110fc2f4f54f89427cf34833d4fda8d947299cfb02553a35a8ca87cb1b",
    "signer": "0x0414a6f0C29cB2953342f2ebD9b2f4048bC0D6a4",
    "userId": "725217899"
  }
}