{
  "manageEntity": {
    "action": "Update",
    "entityId": "875047146",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xa0c5a2d4259881408c4246750da6b6d2a88ab24e178e847036e919b8deeec769",
    "signature": "0x449c0fd59b414e5525235f498daee6fc756da2835f663ee9582e0f5eb40bc8ef021a4ef8815caf9d97557eb7170150335a2200ea9414001c9917830592db0e251c",
    "signer": "0x8700074A90b1Add14Fb38791e36835F07f5992D5",
    "userId": "875047146"
  }
}