{
  "manageEntity": {
    "action": "Save",
    "entityId": "51565841",
    "entityType": "Track",
    "nonce": "0xa6dc4bc3322e62318a06b6a31ef6d3901cf49764efd53ecaa266969846c61444",
    "signature": "0x3bc51b0a4e533e81ba6fe7b57d0b1ae5ef54286f265fae99ead6eb2faf736e821f7feaa458ea33892d9a158e0680a5a6e92c4f02f84b663f8dffa88d9016f7231c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}