{
  "manageEntity": {
    "action": "Save",
    "entityId": "1769741444",
    "entityType": "Track",
    "nonce": "0x1f3dd70e5483c3cd04c92ecfdf9a2c46b5aa0364ae3b02d7d42f8dc42f2ec76c",
    "signature": "0x06a47b7e15b380eae41a1d531b73787fd1c9ada09e894fe89295ad922545c64925dc4e7d5410c71e9948d6423316638c8230f75b26fe3f8563321ac8e64c22fa1c",
    "signer": "0x39BbEb25924EFA2144235AA6b9287C30dA0bEF8D",
    "userId": "320790987"
  }
}