{
  "manageEntity": {
    "action": "Save",
    "entityId": "1547102875",
    "entityType": "Track",
    "nonce": "0x459da930b9c05f54fb89b233b6e6e3e2f5a6f1094719bcf3eaf596a9492461f3",
    "signature": "0x6cd73ab67646a4dbc0ee400a6d7990161f7a1d10092d1a15da31710f47c23198237f34037842bb85d4063e54eb43ba8b07ce1445affec94f4218c4eb5cae88141c",
    "signer": "0x38ECcB9EE00b4bf5809D1378a0E473126b01926A",
    "userId": "339278109"
  }
}