{
  "manageEntity": {
    "action": "Save",
    "entityId": "900055682",
    "entityType": "Track",
    "nonce": "0x11b1211981952b59b184e58e55b00d4e23fcf70a2336f7249dcd152ec94201fe",
    "signature": "0xbeedd3fb1b80a314eb0ea11936810cfa78628c079df3d7874afda643a385b0756b317d4a4f5b018613d5797218815acb1eedf1f0fed4e1ae8acb428139868e1e1c",
    "signer": "0x4089d1751487aA665C895419F2578a6Cf33BE481",
    "userId": "728155533"
  }
}