{
  "manageEntity": {
    "action": "Save",
    "entityId": "1561689778",
    "entityType": "Track",
    "nonce": "0x90430832603ec29e61fd9fb790a61f116c9ce2110c543f80806cef4836f9e042",
    "signature": "0xb07e6ae5175b60fc2d8403285d5cf0ab1de831beca4653b20c6f177fdbcadd7261a5bef7deb35be7c9f1e26d38400780c9f49d7dd67364c67dcd9585b7ac1d141b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}