{
  "manageEntity": {
    "action": "Save",
    "entityId": "1867655526",
    "entityType": "Track",
    "nonce": "0xae2ea65708d6f064a583dd1e143bc18b8a9d7306960017aceb020398e7c9c183",
    "signature": "0xdc085281649a2a7a09d975ad042055e5ee43b88db828fe1e100cb15213fe6f9009bafd2c63355c26d25bedd3113bdec161efaee060024f4c87d720d06b1c09a51b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}