{
  "manageEntity": {
    "action": "Save",
    "entityId": "1250230433",
    "entityType": "Track",
    "nonce": "0x75702948370873b8378cf59b77773b3a48aec6bef6fc3285b7f65fd8cbb4d3d6",
    "signature": "0x3702872ff5dc3cb4f0a3c90740380be2c73c6b4f27bb772d6f3b8b384ffe696d0a9d2d49dc69d082ecfb6d4bcc6e0646486e0fcc06cc656fc6d97ea31fefebfd1c",
    "signer": "0x2ACda02e37Db2DC08f82aEFAB268F0610974bb3c",
    "userId": "416239376"
  }
}