{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x42e8e08e3f28336a897033ec3af5498313266492417b6a47a40221fad4643cea",
    "signature": "0x786a11c62f09ab046c75417556df588fbbd6a1f09329490ec66f57e0143a224b152c9786edeaa2bdae630b9df1c597a43ffaf94ad407fb8956d7dee1f3d2b3811c",
    "signer": "0x81a6976298DDa0B267D3c5C2581EF2671a909f4b",
    "userId": "410531907"
  }
}