{
  "manageEntity": {
    "action": "Update",
    "entityId": "121485742",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieraufamnurnwifloe6ns7q2bibt3iabxkesktjre3tymjzlf3s6mnpq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1662299695},{\"type\":\"playlist\",\"playlist_id\":1972440615},{\"type\":\"playlist\",\"playlist_id\":781025902}]}}}",
    "nonce": "0x03e958d09f85b485c03848f780f192b3f7615beb03e384977f5ecfe82dda4aef",
    "signature": "0x2b667d5ae6ee76886fcd1dc326d759172a421b2fb11376a2f2a90c679ab592ce002120f50f57cb87acf07b1f88e8e4f446a48e8a8ecaab2b959c478fa98395411b",
    "signer": "0x5414e2895Ab8E07072C26888DE16669f1BfA5B31",
    "userId": "121485742"
  }
}