{
  "manageEntity": {
    "action": "Save",
    "entityId": "1999132000",
    "entityType": "Track",
    "nonce": "0x7036ce8fb9da53feaf09f708620bc84e85bbf0f8bd31a661715ebfea575fc08e",
    "signature": "0x84146a9072b22e0c5980593f4cced4383780d4bbdd4ead42a3d710667f9273f00f08f74d735712342c473c662cd1e191b06981bb3b146d5d8a5eec96592c648b1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}