{
  "manageEntity": {
    "action": "Save",
    "entityId": "780756435",
    "entityType": "Track",
    "nonce": "0xaabbdf1bceb4e10b071b07ea2c60944f325164b5a2e547015aa3c041b1c779a0",
    "signature": "0xda917474581414555375733f356d928eaadf9b175980171f33eeef216083172a38b780ab24fb00e066012e161d40f0dd43c94aa397a5f105062db0a127b588691b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}