{
  "manageEntity": {
    "action": "Save",
    "entityId": "480210",
    "entityType": "Track",
    "nonce": "0xb9c8a05e68e460199240852280eaa9165ebd4d460214507886b960eb52a09c2d",
    "signature": "0xd26c9e4666543043de0a83d9c5f33d653ce669d3f748646eb07c6b0032e64fa0064d60f82cc7815a4d0186ce798cbf184af0b6717e6518c179945863dd2b45691c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}