{
  "manageEntity": {
    "action": "Update",
    "entityId": "999470143",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieraxcaoix3n454amip5jbbhyyvw3uurgik3osn3chviav7fnzmflgsq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1072219958},{\"type\":\"playlist\",\"playlist_id\":597668671}]}}}",
    "nonce": "0xa1ac82cb0f09300844e3b4a6d6fbe35a043a3aedf3482c58823bf7019d9722fa",
    "signature": "0x5de9457e8abd33182a0361f5b73ec47efe73bc19d10f5fa9d2104c1ff0bda2542fddec7bdef9dc08a9d8dc20a0363dada06506090462f177deb0a90090162ffa1b",
    "signer": "0xac99e0cA4F2Afdd2B7dd2403d95C9C0E6A11c255",
    "userId": "999470143"
  }
}