{
  "manageEntity": {
    "action": "Update",
    "entityId": "400923052",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierabywttz7cuvhi3mfyof5edy6ljuoxkwczzioqvfwppagflfuvm5gq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":8134}]}}}",
    "nonce": "0x8818ad5a7e785cfb36ecfe0b275092b9b47c11a1163a29c745cc6dade8f43299",
    "signature": "0xfea06812dab5642f344b68235d389148c969e59fd72ec30ad0875389e0baacb679dd292ca973f4d9debd06c6f4cf333ad6d6be0b84454db9e3b676914705fc401c",
    "signer": "0x1b8DcAD5ED837233989D4f246852f5aAdf1f61eA",
    "userId": "400923052"
  }
}