{
  "manageEntity": {
    "action": "Save",
    "entityId": "1999617895",
    "entityType": "Track",
    "nonce": "0xfdab0f43dd99465e2f3818bb53b403e86535230df620e94f2d4344096a8e969d",
    "signature": "0x736ba64d0b03002214d37f8ea820d273eceb456ff3d8d41d95171f108ec32ebf3c87eabee8f8fc0ec733f36a309dc3dee8164f5521c8d5287f10306620106beb1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}