{
  "manageEntity": {
    "action": "Save",
    "entityId": "1901400445",
    "entityType": "Track",
    "nonce": "0x245ad020b60b6cd71a79d7db2eb3466f08f29cf80c5e66b6d923a831020e53cd",
    "signature": "0x90168dcef1c3571fc82f8b28f48452855c9b5017bf51047fd378919341888198565edd605651a29cff7cb11602c2cfa980f9504571dabd59770bf402288546891b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}