{
  "manageEntity": {
    "action": "Update",
    "entityId": "40456963",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x7a200a1156b40edcbe127b9d197b161180b555c434966ecb6d4b16d081af0b01",
    "signature": "0xb7e6e7bf98b334617e6b3ebc091522e2027be7de20bba70cd2d8c5912995e70a2954b4d597ad9fa1b24e06a4254feaa624998facc2f46acaa029c3d53fda29ce1c",
    "signer": "0xc03B0DC91D4dd69BB843F957bAe8D3B7aA1317EB",
    "userId": "40456963"
  }
}