{
  "manageEntity": {
    "action": "Save",
    "entityId": "147324",
    "entityType": "Track",
    "nonce": "0x07adc535b4b60675b3d7352dbd931a1b941aa95f79b62298315bc2c1979f9b7d",
    "signature": "0x0998996483de6e38180670f4246f3feaaa677e203e81b4a2a5049ab3a666acee2c461ed1a9b3fce8cdb3e3201998fdbbe2c0ce7461ca45605ee135d0434d0dc01c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}