{
  "manageEntity": {
    "action": "Save",
    "entityId": "624626",
    "entityType": "Track",
    "nonce": "0x09498dc929fa790cfaa9bd91ff819641d3f47518cefc0d1ca546e3e0d3969f1b",
    "signature": "0x3b30eebe22b8a32d4860b770f827ac29d656bac74d10c8525b628eab8fedcb402170e2f4ea4dbc36a174c3cc919c4ca75596f609d54ca972968f692fb5db7fff1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}