{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x504c9e7629ed48c51dfe19062ee818ef25d28afcaa7ae9f4fa3c36028dce7574",
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    "signer": "0xFc89F8b87577eB13785ce3cA0b136A04ACf8E0b7",
    "userId": "132103506"
  }
}