{
  "manageEntity": {
    "action": "Save",
    "entityId": "750501116",
    "entityType": "Track",
    "nonce": "0x365f6271ad4d87ec6807ffe53dbf1db0f9708474f784f288d79922aba0a89384",
    "signature": "0x6f29bfd784bac0ef1824133e00cfedfe296a0647de5e81c0a10b3a3b31029689170f8a87bb5657d71ad91ec6293df870c2a90855ff58cd55fc5855280d825f331c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}