{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x070bf8a0d091e22f0d78cf3bbd1c50bce24c7181e7a06e1c54fa4d9f0c189871",
    "signature": "0x5044b74a1816c57306f901108c6b5ec0bb42bab67ccf3dc69141140f47c614ca1f80806f6f6a6e1fe4a1d29cc9289530ab11dc043f205931e20aafa785be905f1b",
    "signer": "0x35d43F8F2BDF52629f041a6f8E24d71098998fd4",
    "userId": "561546129"
  }
}