{
  "manageEntity": {
    "action": "Save",
    "entityId": "1495699129",
    "entityType": "Track",
    "nonce": "0x1f68e1f2cb46c731d8f077c26c5ab387a118947d663b3b3ab1d66875ac9d3015",
    "signature": "0xa3db5930bcffbab7746b87531d8136d28230dea4cab23b32731223b13dd1088e025eff8b8a04518a897e13742a3f62027a2d094fd1d9b5e3f403391e8ed1e4371c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}