{
  "manageEntity": {
    "action": "Save",
    "entityId": "1483728840",
    "entityType": "Track",
    "nonce": "0x57f2f9dd2a29cf8ce83d7f0d721a0f6fd80d934e9d59deb918510bd837daf55a",
    "signature": "0xb876507a414669dfd42592bbf9999fee5278222e7bf6664754fd43ffb77b6cc94ca7307579f48ca8a3a44ccaa6e099ad11186a6c019d2256a8d4dc7d888324791b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}