{
  "manageEntity": {
    "action": "Save",
    "entityId": "231538026",
    "entityType": "Track",
    "nonce": "0x215c86de140701f648b69d20c92a0d1a88d97954aeb0fa567a3c6de4546a9a6e",
    "signature": "0x29cfc022a297d1097d80b23f0be882cbde925ee241673c6cca58f7ae989d19ec508518e8ef0bdf4619f6e87e87acbbe44e421d081cb3e3548b72cefceeb1d3481c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}