GET artists

{
  "1": {
    "_id": 1, 
    "photo_suffix": "20170613101031_a6f35dcd", 
    "slug": "weather-custody",
    "sort_order": null, 
    "subtitle": "Powerful indie rock from Canada", 
    "tags": [
      41
    ], 
    "title": "Weather custody"
  }, 
  "2": {
    "_id": 2, 
    "photo_suffix": "20170613101031_389023c4", 
    "slug": "golden-field",
    "sort_order": null, 
    "subtitle": "Intergalactic atmospheric dance music", 
    "tags": [
      42
    ], 
    "title": "Golden field"
  }, 
  "3": {
    "_id": 3, 
    "photo_suffix": "20170613101032_63080b33", 
    "slug": "glaswegian-rocket",
    "sort_order": null, 
    "subtitle": "The godfather of global electronica", 
    "tags": [
      43, 
      54
    ], 
    "title": "Glaswegian rocket"
  }, 
  "4": {
    "_id": 4, 
    "photo_suffix": "20170613101033_8ea45a1c", 
    "slug": "aramis",
    "sort_order": null, 
    "subtitle": "Alternative Rock", 
    "tags": [
      41, 
      54
    ], 
    "title": "Aramis"
  }, 
  "47": {
    "_id": 47, 
    "photo_suffix": "", 
    "slug": "steven-kotler",
    "sort_order": null, 
    "subtitle": null, 
    "tags": [
      42
    ], 
    "title": "Steven Kotler"
  }, 
  "5": {
    "_id": 5, 
    "photo_suffix": "20170613101033_ac842273", 
    "slug": "blue-violin",
    "sort_order": null, 
    "subtitle": "The Balkan beats renewal", 
    "tags": [
      41, 
      56
    ], 
    "title": "Blue Violin"
  }, 
  "6": {
    "_id": 6, 
    "photo_suffix": "20170613101034_68880e54", 
    "slug": "leonard-christensen",
    "sort_order": null, 
    "subtitle": "Sounds of Copenhagen", 
    "tags": [
      43, 
      55
    ], 
    "title": "Leonard Christensen"
  }
}