{
  "manageEntity": {
    "action": "Save",
    "entityId": "587658980",
    "entityType": "Track",
    "nonce": "0xab2ff135f703a45ab03e46d35fa16db977a524706430569d8f64cde469b546b2",
    "signature": "0x89fa5028b30e517e5fffbf5fe843a5a969bfe164077dd7f05957c383d503d4da03f190ed4a5cb4f965d3f5bba4f04c705319d001f57a5c9213600520dbf6c9e21b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}