{
  "manageEntity": {
    "action": "Save",
    "entityId": "1868513232",
    "entityType": "Track",
    "nonce": "0x331e69cca290e2ca3627695317b50c8ab485279a35e1821f4a3a39dc989cef3f",
    "signature": "0x3dc8a38d5c676a13dcee02a77a9c741cdd7f68df17e55c0fc462e7d4145025b616038358a6ac853904742b974266cc1d4c7f044f209eed9058bedb891fbc0e4b1b",
    "signer": "0x45f053EE6d99e48800FdabfC3da995B364e9dA54",
    "userId": "628434403"
  }
}