{
  "manageEntity": {
    "action": "Save",
    "entityId": "541251970",
    "entityType": "Track",
    "nonce": "0x1897e33a8cee08ef9a6565fbfde795f907531e8346dc8542a8329adc4318f97a",
    "signature": "0xf1854f7cd36598d8733f99693c9ae9578b5d97b61232ccfea88a520420a4e5813dc806274c1127dd21ca0dbada229ec8dea7c51f41a8e4ba1b3b820ae4676c4e1b",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}