{
  "manageEntity": {
    "action": "Update",
    "entityId": "310890416",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x88436b66d631fa3dbf70019a80d8e029e75bb2fe0d78c769deb898295240c6f7",
    "signature": "0xd9ca48634af61a7b194e28c4a00b75b4271930a179e7daadab4078c6c3e04e6e5b828df7d2e23e82154a3abef459e897bcf11ca817dcb49645e17464303677171c",
    "signer": "0x83E8c5a6B84736a649eE7476eD42E219569B7E92",
    "userId": "310890416"
  }
}