{
  "manageEntity": {
    "action": "Update",
    "entityId": "749228874",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xb86e85c6322c465febe642dcda3978539eaa855b273b157da708afdc8e842753",
    "signature": "0x649f1bdc46252b8a7a079abab8ee5d35c881bf7d737d169ce7420c4159982f656f5d787594d8068e481b6532f507c4cea55c63a356b8fd1eadee110dc9f5887e1b",
    "signer": "0xE68B644418C49102f3baFE7007482B0DB0df6F74",
    "userId": "749228874"
  }
}