{
  "manageEntity": {
    "action": "Save",
    "entityId": "914998803",
    "entityType": "Track",
    "nonce": "0x37f51ab09fe9b5789d3a5f2cd87ed29a40ea1cce6c9d09d80b7d8fb311ac8dde",
    "signature": "0xdc165aa65a9fcc4b9b98503b9692958beb53c15708006ddd878ebe89d7de2a1b257eecd5f45df346335f0717472a856e2ac169a4bf1068eaaeeaa0911af1ed421c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}