{
  "manageEntity": {
    "action": "Update",
    "entityId": "503107386",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xe43af501b60aaae94e7fcebb3d3cbc90da52f3495cbfea343a1fb60d626cfbca",
    "signature": "0xe91d2ec0f08267d705b8c52028920d3b15e21f882fff13051a0a7d453363c65a1b2fd65850d7edd0f85259e47b54680b0905182eee8156a70da38b00a7e7c6851c",
    "signer": "0x5D00322270e245E33ccB70127b557dc2631900Fc",
    "userId": "503107386"
  }
}