{
  "manageEntity": {
    "action": "Update",
    "entityId": "453839357",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x2eed91bbf7f3653344e0763614db2e5d40e19f97c0ab6915027bec4d78e81f26",
    "signature": "0x3ec0e300846e6f3f2bc9a3a5da2c2605ae3967bce596092dd1332cd1ad1746d017d9f4879e90464c651cbc2327a2d1534acc0100d132cc50af04444dd57444301c",
    "signer": "0x520d1f8F1D21c4cE69aec84A2516A94C22C62540",
    "userId": "453839357"
  }
}