{
  "manageEntity": {
    "action": "Save",
    "entityId": "202423",
    "entityType": "Track",
    "nonce": "0xee879220dcba0a470e3626e3c19570e676bd41667a8545dafbec89a97fc58f74",
    "signature": "0x19036274821e00096b3b18c2aef11a7657cbfc080599b4a4006c722b3473650261f702bc6270deff5b07972d235a694cf3d345975e76152654072a2b9ed9e8131c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}