{
  "manageEntity": {
    "action": "Save",
    "entityId": "1019848270",
    "entityType": "Track",
    "nonce": "0xd018efe0d3771e9313005d08ec750307ef89f55529fdbc83d8be93f9df6a34f2",
    "signature": "0x6145e4ff9ab2c1450d4970430582ff1ed6b30f5bb1a2a4297593091abd7a75ad4fafc01157a5ed574f03ae21040a5b92c62db070d7befe25351ca47bcfb729671b",
    "signer": "0xfa1f98f0530E55C2BEFA45f0F1B3A699b4559136",
    "userId": "149566028"
  }
}