{
  "manageEntity": {
    "action": "Save",
    "entityId": "1020523193",
    "entityType": "Track",
    "nonce": "0x54833e9926a0e142a9e7519a1905fe54e6e9614f68b4870bd4e6670707a6febf",
    "signature": "0x1af411a6edff9430212771f49ad4f0d0b88c51fe931a2b69fb8e8ce42dd072511d28cc7aff868feb87eb77b74c7a3e5adf1c23096cf1594bda882b87da7fff161b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}