{
  "manageEntity": {
    "action": "Save",
    "entityId": "208785168",
    "entityType": "Track",
    "nonce": "0x838044a53325a8979a9984219053d3a3342b03fd55ac41763d37752891c9f2bd",
    "signature": "0x90dcaf9a170f13c08e2d6f94114b579854eebc8c421741139f6127b6ae46222d2f19c76006ae4dab3257b600d18744506ad6849822835e7e32c1646f98f7b10f1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}