{
  "manageEntity": {
    "action": "Save",
    "entityId": "1748774440",
    "entityType": "Track",
    "nonce": "0x1cf1638cd6ec8f5466c166eb5c4c4533bcd577b69258934a325b0fc79c775a5c",
    "signature": "0x163c50377371479d3125fdc8d456053b00a3a23c801bda76dbd4237b3396984f11fc834afa8043cf78a6d4a6d01d3bd27bde1b432746a1aeae3818f776e9e82f1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}