{
  "manageEntity": {
    "action": "Save",
    "entityId": "1048755617",
    "entityType": "Track",
    "nonce": "1792093566702481489",
    "signature": "0x2e7090e848656aeb4ea141d102a4ce52f6751aaee6b3bd8cd35b20351ec355695fa4e3da000930ec475925e1f97ec12a76ae18c9cbf4e8ab7c763fa8ad684c491c",
    "signer": "0x512F9723ECbDB6Dc537A671b3D2fb35CC68017a4",
    "userId": "105562689"
  }
}