{
  "manageEntity": {
    "action": "Save",
    "entityId": "429165698",
    "entityType": "Track",
    "nonce": "0x23a6a98bef5c3fe5f489b0e556e606ba8fd8b43e42b2a295ffe74a0e51f111d3",
    "signature": "0xd71ad21489143be0c7358a4c7b3045175bf5f4e385970f38796356e16a9ab00533e2a9971cfcf06478f1cf92fb4bf97c2a8518dce2edff6b8fde2014a7a497231b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}