{
  "manageEntity": {
    "action": "Save",
    "entityId": "1835545034",
    "entityType": "Track",
    "nonce": "0x76cdb123079c263dddb759be6dfa15e1d66ffd46e3fc367aac873de36928157f",
    "signature": "0x4dc6c4a076f3a7add71af8e77920f981c058e5121fa745bb47b95452c152359623b803fa3443171c941db4e77cc53dc30f4db7f45fb5478602ffc969821f66551b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}