{
  "manageEntity": {
    "action": "Save",
    "entityId": "531033",
    "entityType": "Track",
    "nonce": "0x617b570523dd9fbeccb7b0810dda07fca940577bf73393a7d57a756f9d578b96",
    "signature": "0x7397dda53d9f0703f0ba6ea9da75190ee15980b413acc4c27cd43b8c3fe5ac072542225c56730be4337fe5027f18f06e0a5c3a8979785e5d29a5a84bb07327a11b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}