{
  "manageEntity": {
    "action": "Save",
    "entityId": "1271723914",
    "entityType": "Track",
    "nonce": "0x7f33d45cef0fb811f22832d8bd4ffeeeb6f7e3190c466ae41963044d1bf17859",
    "signature": "0x20fb905c01b842ed5685f80191c3802117622f7f9c9fe35c46c3f3a2a7abad8c0d66a44e6f2b975915c65f6793239b7024437327b3a2aea0bef379669100eed41b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}