{
  "manageEntity": {
    "action": "Update",
    "entityId": "748940012",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x5c18a26524ae21c9aa5e4b557ebe9b5ef68f7c620742265e7577d5d43d472ae5",
    "signature": "0x810f03de666ce8b0045ee5a5dcb1dd4d45cf734440a32286842edaf71bf875ab3c6b483b7bf0a282f9aa200d91aecce7d00251d4f9539f7375b5b0d9e0c9d04f1b",
    "signer": "0x73BD7C4402B3cF480115A19678a393865851975e",
    "userId": "748940012"
  }
}