{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "50546066",
    "entityType": "Track",
    "nonce": "0x3e3b2915f76a5273b18df57826eaac8fd52523a663a50cad2cb44e43f818a7c7",
    "signature": "0xd45337e2e78ddb7395ecdb78513aae253edfa57fa75371f4c35c80fddc254c99303a866186c29ae8b025ae4ceed3ee1e807050320c5405bebbf004938a68ac481b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}