{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbca79e68af48df783c6dbcea340f7ed57c89489ddcf5c8636ee33dc190df07e3",
    "signature": "0x9c972024b5c8ceb7227272427ff5fb069532871a7f5b642ce43a2cf217e45ee650f8a709a9beae0629630ba7f9cf74402c59aa290eb1f157ceeb204df58201fd1b",
    "signer": "0x2fff57D5628D87Ce98d02775C9cF63dB765aa6c5",
    "userId": "640804276"
  }
}