{
  "manageEntity": {
    "action": "Save",
    "entityId": "1397298370",
    "entityType": "Track",
    "nonce": "0xbcdc80cf1dc39feffd847be65933af17d15d8eef5317e1fbfe1753ed4b2ee833",
    "signature": "0x50fa895d1591a629a37f950b8a5e733064f39ea3e3b04a02f5ce66d1f6f6c30f4aa51ca7cd78529172d871263cb07dd8773f5f1495efb77ade7cceb6379616571b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}