{
  "manageEntity": {
    "action": "Save",
    "entityId": "812030640",
    "entityType": "Track",
    "nonce": "0x6ee279ae4f47225173a2868ff7e27055c95d4c480b07ed8f559d56efb66ec75f",
    "signature": "0x63a69c118825bcb85a525ab35385a225d9751bc67d098e89d56d43a9fa55269c3a7a6fcb41a59e1ae6f4c3aaefe9efecf6458c3306dc92aa21804032571232361c",
    "signer": "0xC7B16Eee24C03712c67aa884907593f4df23db87",
    "userId": "56534466"
  }
}