{
  "manageEntity": {
    "action": "Save",
    "entityId": "1757357632",
    "entityType": "Track",
    "nonce": "0xd6da020ab23252bb2c06302716e9e8cadf12ed846d3da08407f4f6cd9f7ca28c",
    "signature": "0xadd2f35db06d9b50b027ed5ea273a0b01f76a0c955a20131e29877cd48e8a38d1b641ec3a2c34b874140b9251e1643d43070e193ddc3c09732bcc681ce16f1831c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}