{
  "manageEntity": {
    "action": "Update",
    "entityId": "553289444",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xf197dd804aa527c578183041b8b1eb9354897bfc6f4023fe1466a505f2ed41d7",
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    "signer": "0xC876423a3b87ca321806d467C4096bddab545482",
    "userId": "553289444"
  }
}