{
  "manageEntity": {
    "action": "Update",
    "entityId": "337739637",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xeddd64d3a46cc24abb9f627d69ca577d585605526004f11e5f03c000724ecde9",
    "signature": "0x890b9fb72e675169d9202e68b9c5669598e930908f99a0fc5ebe25901293efe914c87e002805bfdbcfc2bc329d38eab7b1c85eb494b1e48c829ccd680864a6ff1b",
    "signer": "0xa738EEE0069867D724b136d8DFc260e3f505EDad",
    "userId": "337739637"
  }
}