{
  "manageEntity": {
    "action": "Save",
    "entityId": "1232254335",
    "entityType": "Track",
    "nonce": "0x9d7add6ee793432739ef78d81d1cf53091f5e4db4efbea1775e67cd2a2160d43",
    "signature": "0xeeb2bae63b68b0b54ae228532145755486c4fbe2dcd7864b782ee85dbbe50de50eab203335cdac99715507320a875f97bd2837df37872b9d35aa1aadb9958d4b1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}