{
  "manageEntity": {
    "action": "Save",
    "entityId": "1938767582",
    "entityType": "Track",
    "nonce": "0x384cfb259887e8d4c361571a8093ec92c02adbe997a22ee2aa184986cdc78e5e",
    "signature": "0x648365571cb8239d242e3525b3fb875ff6cbf27e832799d91b9a6ca2744104c82a10081f47d907d0a9ed6e33dd186e28bbc5947590206eabf437b4ac8a31000a1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}