{
  "manageEntity": {
    "action": "Save",
    "entityId": "1742774854",
    "entityType": "Track",
    "nonce": "0x0ff9f764bb82351cd0185dc40003e5c47db486c2933cc1ce1e37eaa5e5613bae",
    "signature": "0x22e463c6ca17d8d5badf10a2f4977b22954d309a89a677b4e8d547b2ae9d9b82404185f30fb69b0f44e2227623a175bc2f131fdbd5639d84d03e8709f76412c71c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}