{
  "manageEntity": {
    "action": "Save",
    "entityId": "1020116781",
    "entityType": "Track",
    "nonce": "0x23cd16131458c37304bdd5cf34663525c8dfc772cc537c97ea151e40edcb9456",
    "signature": "0xd6d0c1dcd581ea41c517a08853d0ed0ca1be467605a1c37237787c9323834e3844de0e0d50ff435e4503c0bd5e2610ef5f8009d239f4ac1eb2eea29fb7cbfa881c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}