{
  "manageEntity": {
    "action": "Update",
    "entityId": "7574399",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x2d594c68f8d929c7c455a15563c5ff93bc54f1dc5c9dee9cc404eb43d1713799",
    "signature": "0xe28463ac320e5dec82314d4a05ee3c1811179b5db5a904fca21c0146b86cf6e47c516d375d18f9b31dbc6c87bd753eb30c43e56546f4632adf126e4b391f8e991c",
    "signer": "0x2663bAD5117E3F648993449DB070fe37a2Ec7D4D",
    "userId": "7574399"
  }
}