{
  "manageEntity": {
    "action": "Save",
    "entityId": "912942799",
    "entityType": "Track",
    "nonce": "0x38755ca3e4435743921750534c0bb64c9aeaf205da54df77cc4fb07d9ad7b85a",
    "signature": "0xb9a075653b6b9fa9f22604c9c3a4c7dece95df56dff83e0227a9d9c56205bb723416e18176e7e085e90cf1baea5d87cd0073c907416eb26a4ac3007eeccf01771c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}