{
  "manageEntity": {
    "action": "Save",
    "entityId": "11997",
    "entityType": "Track",
    "nonce": "0x456bce533a4e5503b0b73548ef8e7a78198847d13a3147229b48e8031f181f3a",
    "signature": "0xcf8bd81a602ceff8241652c7db9ce2aa9b17d3444b8ca721ce1a8198d8f96c3b4cd0f08e7c837a910c929db123e1654fb0b7405b3402a80d3b33fd1c76f595171c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}