{
  "manageEntity": {
    "action": "Save",
    "entityId": "406229",
    "entityType": "Track",
    "nonce": "0xd369637d6be4b9f0e030981fab99bdd2ac76c7f20bf8cb33377dc724f7da22e3",
    "signature": "0x079189f4b1d293901b2fce2de909fb8925b9bb20b0e2d80eedf98077957e947864eef3de5ed9bc18050f9e9013dbe36d9d877ff5eb33dc17ebe0786f4a77616a1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}