{
  "manageEntity": {
    "action": "Save",
    "entityId": "22638084",
    "entityType": "Track",
    "nonce": "0xf736009f0e08e2e8e72eb624df985ed6203f663d02243a9aa09767a6ed623b53",
    "signature": "0xc7bbe3b6882ae493ddc201e096d4621605a24934ec8e673e7776a4d7e331ef8b05d8ed0a79b08425104dc25ac2e9a23fb6ee7639a1f41e65f1c85987f573adbe1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}