{
  "manageEntity": {
    "action": "Save",
    "entityId": "1332430576",
    "entityType": "Track",
    "nonce": "0xf45bed512c76e2f08c602085b87316120f05d61b91031491b807772f0825df84",
    "signature": "0x0e64f2a21d8269a791c9af59b9a14c78ce453386caa29d48e850745a6157b0c33d7f6bd6a88d8fa83f24c2a4af4b570178897679b32837f50754f9f58ad44b121b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}