{
  "manageEntity": {
    "action": "Save",
    "entityId": "615325824",
    "entityType": "Track",
    "nonce": "0x2b72f8bb4db38003ff331045a91ee89d8741a04edbb36b93c5b71cd230fb29fd",
    "signature": "0xb5d98c92eedff19c9ff233cb68062f17ee0042b21cd8e17cc0c616822e27c09066345881a009a8caad99eb5ac12414fa87f2a14f987a92b03a3fad20e2e4f9b31c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}