{
  "manageEntity": {
    "action": "Save",
    "entityId": "343385",
    "entityType": "Track",
    "nonce": "0x21bf064085fc0458362ef6925e0a88cd6750f1d316c1b03e2bd550e757e1376d",
    "signature": "0x1d8c18cf8c70476baa70414d2e62eefa7fea430400b67ace82fdec2304bdb255446bb3fb9945d0a41547e64e1901a1e68294b10bb9ebc6ed62be19aa9c59c6bf1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}