{
  "manageEntity": {
    "action": "Save",
    "entityId": "1609414166",
    "entityType": "Track",
    "nonce": "0xdefa2a5b5f60446fa7f083420e86b8cec5c85e592aa615723a14d37cbe0084ab",
    "signature": "0x9a9875a47b429ee13f46282e24d60a2e1569120a01e91b91651b7d78ad0414124ef0e92898f1e95721629468dad5f97fa1df87bb2146142ae65eb37aeaae42fa1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}