curl --request POST \
  --url https://varco-{partner}.musixmatch.com/distribution/subscriptions \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "musixmatch_user_id": "mxm:123456789012345678901",
  "partner_user_id": "123456",
  "plan_id": "artist-plus-annual"
}
'

{
  "message": {
    "body": {
      "subscription": {
        "musixmatch_user_id": "mxm:123456789012345678901",
        "plan_id": "artist-plus-annual",
        "status": "active"
      }
    },
    "header": {
      "status_code": 201,
      "execute_time": 0.04
    }
  }
}