{
  "manageEntity": {
    "action": "Save",
    "entityId": "1358837626",
    "entityType": "Track",
    "nonce": "0x7487803ae1b1b18b353d73cbf4587bcb587e33c620ff60381fb36da296d3e7c3",
    "signature": "0xf6dc67c0e507537d623a68ef9d3c5ddf41ee076338322e52e8439d950f6cb24572ebe3f4f70877abc7f2d1b939def4c4d3948bf40875a48e4257ae2273bbfda71b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}