{
  "manageEntity": {
    "action": "Save",
    "entityId": "566047154",
    "entityType": "Track",
    "nonce": "0xf060ace69a74c931be1b73406119f693ed44ca3ca886d487e02aa365b6b0bdd6",
    "signature": "0xcabe7667f2cb8309128d50fa178b6086e18118a9a2a2a5eb2fac8696e1907f492234e5ba3dc5bd8c74380588a531f5d35f3c607a4f9c657fb11fa0e60727f5811b",
    "signer": "0xd1bC12b8b46f2FAa152aB791052b4a26826F86F5",
    "userId": "481080235"
  }
}