{
  "manageEntity": {
    "action": "Save",
    "entityId": "2131157225",
    "entityType": "Track",
    "nonce": "0x718fee926fcd69a18421cfcae7b26e2b5d0dc06b82c6b10689a3e23e5021cbd5",
    "signature": "0x93f6e8d14657c4370086887e001a7a784fb9650ab9b9da524dc18658c26fc30f6e348d8f4d4a69f8b62d2cb87954c8077c399705eb946d4c2e5c7d71238ec7691b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}