{
  "manageEntity": {
    "action": "Update",
    "entityId": "721428438",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x3635702ffe9fd142cde624203cba84f29a0bdc75318a45273888f0a67334b193",
    "signature": "0x30589d203ad6f3aaf8a6daf1ff17a19e7648abea7eb0a71f26d12616b70a47566a8011da45f6e4b8b7acc52032cf00fa98c1bf4fa48ed47fa5fa369a4c78e2671c",
    "signer": "0x4a6aD7655A778B68A120F68E69f6099b8BB6451F",
    "userId": "721428438"
  }
}