{
  "manageEntity": {
    "action": "Save",
    "entityId": "702201",
    "entityType": "Track",
    "nonce": "0x7fa13600ea0fc1f891351c431738cac29db49727f3e4edaee740757f917810b1",
    "signature": "0x149fab635ef6e6445193d001b9bca38d7c61a12fa0b87af2ebe227b8e55932ba1e9cd097c977edb295ad613ca7951af858a327b09d474de97c2705e74e6034b21b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}