{
  "manageEntity": {
    "action": "Save",
    "entityId": "267929",
    "entityType": "Track",
    "nonce": "0x3c06240750fee62edd0b51fcce20bf2e45d414dcc85897a7165e8263f65c5b64",
    "signature": "0x27e91d00023c85612103def4fd03626ac81f2635b2c46d97b3aa46135d5cb20d08a6f947c6f509033f94fe09ecea0237f1f7b46b30972d568e72c39fca1683d81c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}