{
  "manageEntity": {
    "action": "Save",
    "entityId": "690396132",
    "entityType": "Track",
    "nonce": "0x978bd9575e67cee3831f6afc81fb09c5276befa1e2622f43d459e75fff87226e",
    "signature": "0xc11aff8a22611e6bbfbf88f7afc0e0bab6ff04b661b9371c306ba250597e3f8745c9c44e9296aa2fb93a6931c0828013461180da912f19ff9a88dd5c12c3ea591b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}