{
  "manageEntity": {
    "action": "Save",
    "entityId": "1015345297",
    "entityType": "Track",
    "nonce": "0x48f009fcfa8956f5ac5f8334065aaec2cb27d224c03fdc97111946a8825cff7a",
    "signature": "0x267b941d25124cfec6c6e033c4b4266c8301959bcf611e8aff22cf780e4503e11ee8a4b759aa29bc67bdd6682be7c9c802be3ab123b5b372cfa7b4c371af4d011b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}