{
  "manageEntity": {
    "action": "Save",
    "entityId": "1229112258",
    "entityType": "Track",
    "nonce": "0x924783b7c612ef27dacdeb2da72dfe48d46e4f717bf90846ff68e155ee058529",
    "signature": "0x9371cbfe98236e4457b23f2e2aae1e00030c8a4fd31503b1e674d03683acc0eb707a02758ea6fe954bcf61f3e2cb65c90ccef25685254e9233dc204214f4105a1b",
    "signer": "0x4089d1751487aA665C895419F2578a6Cf33BE481",
    "userId": "728155533"
  }
}