{
  "manageEntity": {
    "action": "Update",
    "entityId": "519346245",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x0acfceaf86c472a338566ccb0c0347e5758bb3b89de57db2442e43f844a44218",
    "signature": "0x9551233ac83f7bcbb20d138cf5fa6807dfd15a2586836a5c88d15095f93c16b6355a80a56ad8e6c7cc6a74b9a2d1d5758dfac3e6551427bfa00a142c60c8f1821b",
    "signer": "0x343FF28Ab8C942919E3753f03D78361CA20CA77e",
    "userId": "519346245"
  }
}