{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb2c7b484aecfe2579e0445d9dc60f51da9d08b06d5a644d9da847a3f4172b3ff",
    "signature": "0xcf558048d1a59faecaee920450f18986b51539915f67fe3db675b0565d9441107d42c623611ccc29fbee0613cd3ffdee5cf743b1d0d39ffcd080e7e3c20b68ca1b",
    "signer": "0x3A142A3A7eD25C0818EFB5ebDf47d13B6D3C8940",
    "userId": "56708291"
  }
}