{
  "manageEntity": {
    "action": "Save",
    "entityId": "1073302555",
    "entityType": "Track",
    "nonce": "0x03779bbeadb56c7a740fd0d3a04ec16e419fa1a40bb19c6d2794345d4a9bd65e",
    "signature": "0xc1ca050338c196ea1aeb82888e22f66f1e52dadc8dcdfbad005a83faed4e4a394233a979a57f32640179f4f8780c5b0c8276a3d2f4323fe50e44378de63f8c851b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}