{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "666495978",
    "entityType": "Track",
    "nonce": "0x48faab1ef47d3db601bb80a94c41faa56ac8ece996564b0b3c46949a400cf45b",
    "signature": "0xa9c968d8af34dae9dff4e18fb926998e8bddc370f708e31b4c89f23283b028734d9d5fd92f7061582ea2764c0a36cb62adb102696309389124967a9929af86bd1b",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}