{
  "manageEntity": {
    "action": "Update",
    "entityId": "5500",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieradr2bsxo2sivykjspkg4n44bvvyckrwada77fsxql77hegqyzigkq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1795117483}]}}}",
    "nonce": "0xbb3d99c2e650e93d7c27488680c207c37238404b88586a94849bca4eb0319ea8",
    "signature": "0x4d9b789a8a563f09e81d603d017c9ca70a644bb9dd0fd8079dc0005c911de7c00419641af7528659e3c95b6b31fb0c2318e082ed85db1129f694a0df71baa0551b",
    "signer": "0xDC9FB11483106d427BaC29ff4bf0E03f11b4e19E",
    "userId": "5500"
  }
}