{
  "manageEntity": {
    "action": "Save",
    "entityId": "1074857",
    "entityType": "Track",
    "nonce": "0xe8a50000b5a5ea50000d5739350abab7e250bfcfe5444c80d198eecc29d86fbc",
    "signature": "0xc937e75a059b6ed025d5864eba6f0002b506be44a234308c68f5fc4b0ebefaed0c2942702b37adf2985080898e28590cdd6703b5ed8ac6c274ec009142eb7e711b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}