{
  "manageEntity": {
    "action": "Save",
    "entityId": "479911",
    "entityType": "Track",
    "nonce": "0x6e08894aa4d9e739855ab81ec2850c097abc823b0cdb0bcd42de83a3391f3b73",
    "signature": "0x79f7b4a12e712435c74ad0c0ff56cfb61c27c60740d17cacd5503b13d8f1219a2ebbabb13f080f7502d4e1449c813687c14ebb1f7fc29f9489e86598cf9f937a1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}