{
  "manageEntity": {
    "action": "Save",
    "entityId": "869835971",
    "entityType": "Track",
    "nonce": "0x720d52ae22779cbc91c4e9a2a512011c7cfdfc432704d041ba18429124327d35",
    "signature": "0x139e07e8d8e1b2e76a40cdd9cc0e4509ffa719904cef44e0cdfd8835c078431e1eee4d715c4674f93bf140b97e55476d0fb94b88b3fdc5f3c5b126a59bb7f2f21c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}