{
  "manageEntity": {
    "action": "Save",
    "entityId": "636690547",
    "entityType": "Track",
    "nonce": "0x43bed466f73b54a63fdf2e0a1677064409779438c4494a710f64c2f5e2e49296",
    "signature": "0x3ba733efb672f19c8102b7f5dd723fbeea36f0a58d37026915f972856a5963831eb5ea7582f329cc0d8ca68f72865b7965322d63d903c08e06b5fc9adf8a84471c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}