{
  "manageEntity": {
    "action": "Save",
    "entityId": "1558208259",
    "entityType": "Track",
    "nonce": "0x095ca68e166f4b633b4345ab53c264509fb378b63669a57ff4483b92a85a9b75",
    "signature": "0x2c6278a64835df5cb75c673fe3a668c8e408c4c3a1167d589e23314dd1353b084f65a6495986d3e0b2822d276ea1a75dc528ab2985c53e9cab8e8d390dd294981c",
    "signer": "0x5cd3eA7DcAA86960596227F4c8624063F3B8893D",
    "userId": "215993"
  }
}