{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x69941fd6d6f9da292a25b57f67d74b6a0d3c1fa5819f9dda86dee8706109a6aa",
    "signature": "0x14a2456b1324367682d9e353abd6088fd87518bd5c787c6743111cc6f501dc6f0c519ba1a4c504a6554811c6cbf0629b3887f20636d782468290e740ef6ce56e1c",
    "signer": "0xc116c07e5c4eaAaB33084a7B895f29d2105D645b",
    "userId": "15382165"
  }
}