{
  "manageEntity": {
    "action": "Update",
    "entityId": "644137816",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x197617d5090307aabbd8d62c1096069fe429d6d6dcd5af609f853147de689a3c",
    "signature": "0x6d14ee04d2ddca9e06adc777c068e91ecdd5f7f0ac222b3aee800337d2f9c31550291df6172730313b36002196691d39372c9016353f29c207d18783c41fe40f1c",
    "signer": "0x1f5F68E1660799E87FaBE47981B42492ACd37099",
    "userId": "644137816"
  }
}