{
  "manageEntity": {
    "action": "Save",
    "entityId": "578053711",
    "entityType": "Track",
    "nonce": "0x2c0abe5bc0f04d209e54c53e40283d08e2a7048764691a1ec8b2c2ad148491d0",
    "signature": "0xc7e2c52bf2aa502c524b0631173dc39194d7f7fa312b96989b77d2ae4d9567f455f93658ea64829983fea89113be18a216e3226e1f0d5712ffb96dfc31641ae31c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}