{
  "manageEntity": {
    "action": "Save",
    "entityId": "1100456918",
    "entityType": "Track",
    "nonce": "0xf73fb1e5a149f230d0ec1146a9cea5b419a91ac8979b805eaf2c2ac9ef3e7670",
    "signature": "0xed695f4ddba3f3da446bb540f3737d77c12412478d2f1042202b0550c79d636b1b06f6cf9cee303b3f82d77daf0638e48080f686410c33c45f7777e854819f041b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}