{
  "manageEntity": {
    "action": "Save",
    "entityId": "793047602",
    "entityType": "Track",
    "nonce": "1789419939861839884",
    "signature": "0xd3eea608b5b5685b0a00f7f93461d3fb8780445257418370d51e711c1d8bdcf62694e1be1690bc08464ac1be4dd3ec6b3751632041d78595ed84e543189e34bc1c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}