{
  "manageEntity": {
    "action": "Save",
    "entityId": "357867960",
    "entityType": "Track",
    "nonce": "0x70d83d73f6c01af64ca13d83492166e7a9e3b191f30b68ad6da8c6c0985092f7",
    "signature": "0x6474c310b6c230f6dcf46a73465074611581d0da9bd3979d30091a7f3bc951934a7b3bbd793d02dbecdc15483656caf40b853e952b23350986057dbd6199ce441c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}