{
  "manageEntity": {
    "action": "Save",
    "entityId": "1930133747",
    "entityType": "Track",
    "nonce": "0x8580e5370b9792655f7635ace751dc49e93c47c2fc8a782a5bca11f1c213198a",
    "signature": "0x72b2396faa22d47bca7810b496c9deb04655b03b2011a608e3ee62b7df30704263f1a56e360843489a7d9fdb374619ae518ec611094693b9205b18b5415282ce1c",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}