{
  "manageEntity": {
    "action": "Save",
    "entityId": "537630",
    "entityType": "Track",
    "nonce": "0x357839af6a1843a9535ea7146df6170e8f8a2bd820166053d0e02be5264646aa",
    "signature": "0xda1ae0fb19cacf97312e42b3db2f2d53dde1340e0491cc80fd1a6361b66c5c4f6400b9dcd92a1e5b85765b7b899fc843f21949817e82ed9e1a5e7ff7543613911b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}