{
  "manageEntity": {
    "action": "Save",
    "entityId": "2756",
    "entityType": "Track",
    "nonce": "0x83f66f458d216f24a4e6e350315c8a2d1a6790fc096b464e42dbf84d687d4518",
    "signature": "0x744b5af7ae97fda5b96c6216810d44f7ec8e5f7707193f61afa0892103ed4eaf7edcef31aa79f5cba63dec0fb621854bc1c2f24341c6aa2135fa61b88f6d0bc21c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}