{
  "manageEntity": {
    "action": "Save",
    "entityId": "532948717",
    "entityType": "Track",
    "nonce": "1792467800368943396",
    "signature": "0x3343c9e17499d27b0658ca535d2c95b5784dc8f45c9aedcf29e95df545957a722db45d1d921c25d55e59efa7b426cad4a52710f561f297bf62b65d478658a9e81b",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}