{
  "manageEntity": {
    "action": "Save",
    "entityId": "1198048947",
    "entityType": "Track",
    "nonce": "0xc9c09d18321148f7040d49f600771ce44d372a882e0141347370651e88d195f3",
    "signature": "0xa75102965b4bb4808bbb3f95f08d1eaf3a6a823b3b42abcfa00e4552806f690f7caf19cb3a569b9cfbde674da005fc4f489f32b13ddc20cdb26116c7350a9fde1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}