{
  "manageEntity": {
    "action": "Save",
    "entityId": "1255723726",
    "entityType": "Track",
    "nonce": "0xbbf0eddad69b7ef96947baa1f6a44db1aeaa6cba75612bd9b983ca287ea52353",
    "signature": "0xab72ba37bb76d618d99a62b5f88bcd74e7efa07c9cfa582cf7e505424cc357ef70c7b4d8cb27474a5100f5ee34c74d2a1f164099642fad9a1f45d1870471260c1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}