{
  "manageEntity": {
    "action": "Save",
    "entityId": "127249",
    "entityType": "Track",
    "nonce": "0x966df243b9ad8a54732e29b7907b18cadae7eadd7602ec8344af19873af21574",
    "signature": "0x7770a27659661d452c316fbff32edd77443c1e470d65c6d788b7ed7c0bc0f5c05be40c376d449314a1bbc37350a458d6b4398b4ed27498ab2f53b5cc90d788971c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}