{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4d8d52b4ec6d3971c0b024b33186a7924111346115b67da930854a1858ca3a65",
    "signature": "0x39962661fbab210c1e85be6820eddacaf921f70d04c61fd47530bb945a43bb67284e009df7f4e46d75a34a8c700a978068edbb9a27a4f55c13c506428bdca0051b",
    "signer": "0x325bE63b5dF13a4b07D43f94Fc4D97c7A4Bd229A",
    "userId": "771300663"
  }
}