{
  "manageEntity": {
    "action": "Save",
    "entityId": "1533788873",
    "entityType": "Track",
    "nonce": "0x903e8eb0572fc366ff1906fb57d650e5a942092ad7c92e9a92cf8b0e9a6a8550",
    "signature": "0x0f5469bec2c618151ab018afae528e45ca7591f0dfdf1da115174098a18e71826c8e6dea2997d387cd1ca601dc7dd15746f66cf6c5b2dfca0c4008d3a3b81d621b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}