curl --request POST \
  --url http://localhost/api/v3/profiles/{profile}/tiers/assign \
  --header 'Content-Type: application/json' \
  --data '
{
  "tier": "<string>"
}
'

{
  "data": {
    "id": 123,
    "profile_id": "<string>",
    "current_tier": {
      "id": 123,
      "name": "<string>",
      "handle": "<string>",
      "is_floor": "<string>",
      "value_min": 123,
      "value_maintain": 123,
      "is_assignable": true,
      "internal_notes": "<string>",
      "description": "<string>",
      "short_description": "<string>",
      "long_description": "<string>",
      "terms_conditions": "<string>",
      "icon": "<string>",
      "image_url": "<string>",
      "earn_instructions": "<string>",
      "disable_credit": true,
      "tags": [
        "<string>"
      ],
      "meta": [
        "<unknown>"
      ],
      "region_id": 123,
      "region": {
        "id": 123,
        "name": "<string>",
        "handle": "<string>",
        "is_default": true,
        "currency": "<string>",
        "created_at": "<string>",
        "updated_at": "<string>"
      },
      "created_at": "<string>",
      "updated_at": "<string>"
    },
    "next_tier": {
      "id": 123,
      "name": "<string>",
      "handle": "<string>",
      "is_floor": "<string>",
      "value_min": 123,
      "value_maintain": 123,
      "is_assignable": true,
      "internal_notes": "<string>",
      "description": "<string>",
      "short_description": "<string>",
      "long_description": "<string>",
      "terms_conditions": "<string>",
      "icon": "<string>",
      "image_url": "<string>",
      "earn_instructions": "<string>",
      "disable_credit": true,
      "tags": [
        "<string>"
      ],
      "meta": [
        "<unknown>"
      ],
      "region_id": 123,
      "region": {
        "id": 123,
        "name": "<string>",
        "handle": "<string>",
        "is_default": true,
        "currency": "<string>",
        "created_at": "<string>",
        "updated_at": "<string>"
      },
      "created_at": "<string>",
      "updated_at": "<string>"
    },
    "prev_tier": {
      "id": 123,
      "name": "<string>",
      "handle": "<string>",
      "is_floor": "<string>",
      "value_min": 123,
      "value_maintain": 123,
      "is_assignable": true,
      "internal_notes": "<string>",
      "description": "<string>",
      "short_description": "<string>",
      "long_description": "<string>",
      "terms_conditions": "<string>",
      "icon": "<string>",
      "image_url": "<string>",
      "earn_instructions": "<string>",
      "disable_credit": true,
      "tags": [
        "<string>"
      ],
      "meta": [
        "<unknown>"
      ],
      "region_id": 123,
      "region": {
        "id": 123,
        "name": "<string>",
        "handle": "<string>",
        "is_default": true,
        "currency": "<string>",
        "created_at": "<string>",
        "updated_at": "<string>"
      },
      "created_at": "<string>",
      "updated_at": "<string>"
    },
    "is_floor": "<string>",
    "current_credit": "<string>",
    "current_progress": "<string>",
    "current_remain": "<string>",
    "next_progress": "<string>",
    "next_remain": "<string>",
    "total_points_12m": "<string>",
    "total_points_achievement": "<string>",
    "next_progress_change_at": "<string>",
    "anniversary_at": "<string>",
    "maintained_at": "<string>",
    "assigned_at": "<string>",
    "achieved_at": "<string>",
    "created_at": "<string>",
    "updated_at": "<string>"
  }
}