{
  "manageEntity": {
    "action": "Save",
    "entityId": "1090499171",
    "entityType": "Track",
    "nonce": "0xfb13c31b4dd0f1a5954467d181e9206b5843eab1516fb52dacee02ed7e1aaab3",
    "signature": "0xb6cb61a9bb1004af1ac5a4a57798b4db352c62188aff7952b5491fff48d97e5e1fe4cdbfed503ad52f67e9e38ba2a0d63e07df815b07ebd06643b35db704eb861c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}