{
  "manageEntity": {
    "action": "Save",
    "entityId": "409955",
    "entityType": "Track",
    "nonce": "0x055e9e2ee1dad7b82f69c3d3b0d7c5028615862bac6ea6c81b61128c418bb351",
    "signature": "0x2185674cca6110b279f2ee963c7d61acf177c90fb18c28c254c79192b7bcf9fa211b558c2b9e107fa5113c9b4983d2fd74daec1ce2eaf8cbf17fc17cf14173031c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}