{
  "manageEntity": {
    "action": "Save",
    "entityId": "1961204559",
    "entityType": "Track",
    "nonce": "0xf169e2faf2b03459c27eb3212901d1c4c3017a0fc68c142c35dab97933d363c0",
    "signature": "0x026c7e6e21efb5c6c0120bc3ea12cf23add591537a42e7ffb0014cf3f9b417fd27f8a5994e27d343e079152d04fec3139178cc3379df21ae6c93149c9af822b31b",
    "signer": "0x9765cbE8e26a2c6c4847C1B69ABeB0B5250EC254",
    "userId": "678556080"
  }
}