{
  "manageEntity": {
    "action": "Save",
    "entityId": "2100617299",
    "entityType": "Track",
    "nonce": "0xaccaf60f5b9d051e2ab93ef7f3379da124fc9893814029016b10f63c2fa72408",
    "signature": "0x615633754e89f7a572908b94bba7f7d7c6636f500d03470cd1d36e45f23730a748b2656d50827f1264b32650787dea74a395eb29195fb252f49506cfb83be98e1b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}