{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb320b39a50a5077fcea9d4589c472c174873353311515c9f59c8eb86dc8d11de",
    "signature": "0x5cbb599a3228871ac9753e6a0a200586c9f36bc76e23bf7c690cfb48cebbe040606fdf048093ddc8cfa5a33462cc93447df082a8a22b761a14b1670fe21075551b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}