{
  "manageEntity": {
    "action": "Save",
    "entityId": "1758934123",
    "entityType": "Track",
    "nonce": "0x919435b6431c7851e13dc6658f0a747f07a5c28bf1f9abc485a6310f97019723",
    "signature": "0x4e51f7b53ab93cfd507a3b20ef6d6a711466c0a8a1033313971f890b415d0213764d44de036487018f05bbccebe2cc4dedd1149a095559e35bfeab83fbc6958a1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}