{
  "manageEntity": {
    "action": "Save",
    "entityId": "54025643",
    "entityType": "Track",
    "nonce": "0xd41fc7e7deaa882a5514e5e35b89b96c27a4690796b28d122292db44f96d818b",
    "signature": "0x720c3fa643449253d6afce11f12772ceade9bf7ba0fe4f91ce9617c8070d2c5c012325042cecf9644a9a1b68d8f76639711afb4aaa36676ab4b2c98f1be41e721c",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}