{
  "manageEntity": {
    "action": "Save",
    "entityId": "1707852088",
    "entityType": "Track",
    "nonce": "0xe3ab69ccf7be4c6b8ed285060f3449f75554fcff9e3c193b9c0a0d85ceb738d8",
    "signature": "0x9a51554a3ae5614f0ece0225c64b0b9568d5ee1d79845043533bca58c27911bc1953b1e9d359cbcd56e754f351121a941b537516c5ea1aa006625b0e31e0f9a81c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}