{
  "manageEntity": {
    "action": "Update",
    "entityId": "557739395",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x15dfd84b1868487e443eac53646c77d7da9f10bd9a6011ce08cbd0e32c930314",
    "signature": "0x6cbc69b36e5b878838507c52da8167adf9da8829c2c003aa743248ab4a30b9425ad46f998ba73d877a08fec12e599271dc113f485361c1b22b368d9d3792ac011c",
    "signer": "0x49Bf16AF8b770698D8C605Ae4571C40188480374",
    "userId": "557739395"
  }
}