{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x92ef6c8365f26e32f4847fe9992e2eff0c4146d826f4ba75ab21ef9c4ff5f3c4",
    "signature": "0xba9f25f1b9cf56d9de895651d5a45f0b99c92afcbaa87af8dede1aa78aae264f10cd78c6e074009c28be1736c7b5e3227fd135c63dd7a6579aa85ba2455f7a281c",
    "signer": "0x52b78f48D060255571f663715bCc36EC30De3E00",
    "userId": "226923104"
  }
}