curl --request PATCH \
  --url https://api.sandbox.bitwage.com/api/user/distribution/allocations \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "user_id": "<string>",
  "allocations": [
    {
      "distribution_id": "<string>",
      "allocation": 50
    }
  ]
}
'

{
  "updated": [
    {
      "distribution_id": "<string>",
      "allocation": 50
    }
  ]
}