{
  "manageEntity": {
    "action": "Save",
    "entityId": "594386756",
    "entityType": "Track",
    "nonce": "0xa7ce2128223b229623093b76927acb0c1fd2b97866869aa30660b0bab58e85cf",
    "signature": "0xdca9849e1d2406691b6f03d70eec8bb67a07cbfc2d5c5a56bb82a6491eae39f3709ea336240c8a08fbf288980f04c35a246a93b66950de4b79492bf3e30802f01c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}