{
  "manageEntity": {
    "action": "Save",
    "entityId": "1373632392",
    "entityType": "Track",
    "nonce": "0x1ce55c6f218aa787a64c2b3dafe874a5a9f4ad7a9802b216c928a157d1be7d8c",
    "signature": "0x3e8acb69dd321bada7af90512e5304f87ffec3d4e850c5cc07cce4f2fe6614417e108b11393d3653fa7095999c695ffb5c2d7d60bc9b55b60678c498a51e19c31b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}