{
  "manageEntity": {
    "action": "Save",
    "entityId": "770612142",
    "entityType": "Track",
    "nonce": "0xadd25095e8f0ee74023490f6381323a13b94ff05dfc703ca932ab4dd480d735b",
    "signature": "0xdb636c9f68f19d4df3d80f8c6b9e73c99c49ccaee2fcde4bdc5b9e2d230d60644be8848aad3caac3e298eecf0e359bb41e83a0a834b88e22d2e805214610eea11c",
    "signer": "0x48a006fC89FEf065AAB7A5769519625870833CC6",
    "userId": "128172"
  }
}