{
  "manageEntity": {
    "action": "Update",
    "entityId": "306742400",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xec561af3f2e8fa8f8fb7d15efd0030bcaa804849214233881eabdb34ec455273",
    "signature": "0x5884479769ecae3debdcbc5ed382711e6d3afdf1faa2daa2ace152f5065728e46c608a27bdb49b8d4900f1b822f0f9e4081ab73723497a0c7324d8a8d0533b631c",
    "signer": "0x9e083fCC2685013Dee22A8E890b1Cf85627a14ff",
    "userId": "306742400"
  }
}