{
  "manageEntity": {
    "action": "Save",
    "entityId": "1942771149",
    "entityType": "Track",
    "nonce": "0x55260600b2ceff59a1c80ff91df2651a47a34f04af6b8451d3c9eec7e9206aad",
    "signature": "0xfffddb40d81729d71e2c8fb7eefccb8b763bb83609c0bbc22f5b808d27c008052c725f4d0a8be18bbf8e5e7894f264c89c7d6fa3ec8768f2f1df4df23f31db7a1c",
    "signer": "0x52F331C086a11941E738a6C86d9F127E934dDEB1",
    "userId": "281470566"
  }
}