{
  "manageEntity": {
    "action": "Save",
    "entityId": "568134554",
    "entityType": "Track",
    "nonce": "0x5ea25bc90ec35bf6a531de7c91cc5be159548ac93664de72bd1682049f68c077",
    "signature": "0x92d7f0ae74d516a2a0ee1ce4f1334cbf72b4e2fb7a16f5ce13fded356339b62c4045af81dc386f3bf1fbb5d65af0323c166aa21c1364054ae56b2cb7eaeb1ab71c",
    "signer": "0x6AAB6EaEa3f7F15750b649C269b0391dcB19dEeb",
    "userId": "92019297"
  }
}