{
  "manageEntity": {
    "action": "Update",
    "entityId": "234122192",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x6007da814d43fc044b9060576e6d15d65ef945d0d5103d5e66f27b757b0bbe7c",
    "signature": "0x0c75e1306d8b12aeb3923ea0db3b098c3c6d83980631edb4bbe5bf998a14b9336d085c9a66402c57cf6137cd8e5216ff3b84055d6577de294798943ffd73c2541c",
    "signer": "0x436637bD14cdBAb950deA5e8ab694896216708Ad",
    "userId": "234122192"
  }
}