{
  "manageEntity": {
    "action": "Save",
    "entityId": "1560463681",
    "entityType": "Track",
    "nonce": "0xb366f3f5bf816e92845731e8c55ac6ecf1db70720cb36b79d41406498ad52cb2",
    "signature": "0xbec2a514a9864e37cc6e013c288ac40c1eef6b919fd0fdc984344a4b060cac164fe8810e9513033cabc21b13b0f6c2b89f2d0729bb52f10c9a0410bdf38f264e1c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}