{
  "manageEntity": {
    "action": "Save",
    "entityId": "1703595580",
    "entityType": "Track",
    "nonce": "0x9e09a67cbe89747942676b5672e61373362cc96f77edba02b852aa101988c4c3",
    "signature": "0xdad4bdef3ada4352c0c5625c1d9ddc4a0ca7a14572ed0f275a64ab4ed453199b5b7fb7699c993f6a8b8807576f6869cef64a0fcd7a01aec5b02a0b4939607fb71c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}