{
  "manageEntity": {
    "action": "Save",
    "entityId": "433292004",
    "entityType": "Track",
    "nonce": "0x1510748b403ceed07d0117e0a6d5a2ff3e1deb90cea20e92b07b8da6cbf4c1d8",
    "signature": "0x7c4b5abebaf3cedfa982218c65f80ea5ced65298f8a2fd80985c2451a7b99d76018911500e31de87ee4cf07e2c94af1126b136c6530d980ce115c3c2785d605c1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}