{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xca4fb98cf788a6413e5359a8ec12f5a0cc2f444a278efd97f387e50a25a5ec24",
    "signature": "0x246cb4f0867e65812dadfdec47ff7589e494c7174ac7419c58193f6d7ad563bd3e49f9f3eca2525f49eac4935fd0521c6c25ff46835a19f321aa33ae689ce14d1c",
    "signer": "0x2DDabb8ccA44974B42FDAf7c2626747b5bbe12F6",
    "userId": "721302394"
  }
}