{
  "manageEntity": {
    "action": "Save",
    "entityId": "1637136909",
    "entityType": "Track",
    "nonce": "0xecfbb62912ff9ec725b0dedd39254105f44d76b3ec935046db115473345babc9",
    "signature": "0x85a4bb2327c18ded7b70b25830c3562b12d3a9230ae5392239ffd43a81f847ca4026560faaaafd0abcdde958ca80ad7d2426247236140a5dcd541c384ab01bb01c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}