{
  "manageEntity": {
    "action": "Update",
    "entityId": "450273329",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xc1c53ef92778a00adbc17709899aa2bbe162abbede2f5641cb18b71430175b1f",
    "signature": "0xe6c384687d2ed1b340fc3961dcc85131c8f371c9a8fba26f0eb864ab24889fb273179ca5c4e1882ae9a12a876b61551f57616895dd194768ce714c5242858a0f1b",
    "signer": "0xD4331dd613C0E5fa9B91008910A330ef2e333ad4",
    "userId": "450273329"
  }
}