{
  "manageEntity": {
    "action": "Save",
    "entityId": "1606226480",
    "entityType": "Track",
    "nonce": "0x31d75be30d23dedec7115e95b28597ce26e06df848edadc3d5c93282dd6252a6",
    "signature": "0x0897fc3bf4ba71d4e24f43648c03143a0c916b0827c377351c14765ea73fde4e56a02d604950ade3857eee41c93ca4895bb998321db87530c1f47535688699751b",
    "signer": "0xdA0eFB0e7b973C487c12501759aDb23012CB5248",
    "userId": "178070"
  }
}