{
  "manageEntity": {
    "action": "Save",
    "entityId": "324703160",
    "entityType": "Track",
    "nonce": "0xcc8f763722be9f0581b7a57b9ec33368f3617322ae5d10d79674b76ff629cd73",
    "signature": "0x1117fdc8c49097c28706828ecfd7e0999319affb812838829fcd4f9da0f2337f51469158735a1830cdb54caa5a63578d2456515474fa6322b84ff963889194081c",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}