{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb563ee46d5dbde293cdc5b31ae68c5de8b651c4fd7ae9e698c190f5efd39a9eb",
    "signature": "0xae69c74b7e24fa6d27e151a8b3ade50d10011ae3fed84c31ae6acaca98cc38da367e946f3a176cfc03534909bbe9c34d7726dc1d0d52214ee313d5353b56e01e1b",
    "signer": "0x8370Ff952F08E2A925A76D493aE4514A7ef04722",
    "userId": "325668551"
  }
}