{
  "manageEntity": {
    "action": "Save",
    "entityId": "1469097104",
    "entityType": "Track",
    "nonce": "0x5a1405243a31dcb37f703a7571982c9c9a1bc5dc58d6fe48017e2759177fd19b",
    "signature": "0xbe871a6efbf1efcce6fdf14fb8c203a6ab9aef0a2d63d7f9f0afbff4492205ff304d50be3316b276fb8c571dd9cfe83e3c2130aec5168229c7b561e094536db91c",
    "signer": "0xfaC90aF9A941c5ad9B56491ed715c489697fdBF3",
    "userId": "782873500"
  }
}