{
  "manageEntity": {
    "action": "Update",
    "entityId": "902749925",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xa8b68063275cfc5e7b208ab344537491661a440c63e6c4f66e5b403e76347e66",
    "signature": "0x6ff4b0d07802c524ec61255a6806b182caa194367926a2bce6d7239ff3c043b70efb96b12c9676057153575cbdb9b2df2b4fd031ef959e0d789e5229b0c444351b",
    "signer": "0x77Ffa0170C405507aF97CeF807Cf57d7471dF570",
    "userId": "902749925"
  }
}