{
  "manageEntity": {
    "action": "Save",
    "entityId": "1046153241",
    "entityType": "Track",
    "nonce": "0x3d8fa1d11eb686c7c7ffb61b4f456f32e29442bf4c4dddb964bf5e1b860cdd36",
    "signature": "0xe4554dbe9ea25ca23476b4224f7b83c36025827c66c0020bcd6052b73529fb5b146ad5b071ef487fdba1aea697c302bec363dbf1c468bb1bf6abe71c84325da31c",
    "signer": "0x334b140fE9d685A0b45ADF4b1666b979432E75c7",
    "userId": "550101899"
  }
}