{
  "manageEntity": {
    "action": "Save",
    "entityId": "1515018440",
    "entityType": "Track",
    "nonce": "1790534537977920133",
    "signature": "0xedeeb283a963e387a8436f10b8129943d3150d25208bc71cd9e0fe437a9862281b3122eb9431af1315acc5180951594a12f8cf8d4d0a6fa318880e26345bf8801b",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}