{
  "manageEntity": {
    "action": "Save",
    "entityId": "800190",
    "entityType": "Track",
    "nonce": "0xf35e7338b7a65c6d00fedfb205d098323d7cca53c6938a7bb2c847742ab9de8f",
    "signature": "0x02f17ec23459f252caa103a4f296f1f19c63516039c8daf20dc040a1ec3202f85c096ddc06abc64617e911a01c5a423549e1110bea25943ab06783ef7d6c3a861b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}