{
  "manageEntity": {
    "action": "Save",
    "entityId": "565870",
    "entityType": "Track",
    "nonce": "0x8a189ec82b00c752a7b5040f2a09517aadec0978bb6ca3ac63bd8c921c72cc2f",
    "signature": "0x6f8c37be758d4ee1120584fd56a647131ac7fb75aef9f4431fec9986e41797111a76b1e3976ef04bd2bed7c8bd64e1ee338108e8627dd6c521c9568db91354df1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}