{
  "manageEntity": {
    "action": "Update",
    "entityId": "274933861",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierapak37ttvekxrllrka3yri5ek2sukhz7qro33ylibsduid3xown2a\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1843066164}]}}}",
    "nonce": "0x5bda63faa6e96d8c9a9340c80b99fb42c7e072416d7039a4b7f9461c41da515f",
    "signature": "0x5ca9415fa2a80b5c1d56707119e4adbd43d258aeed1a8628f488b141a433710f5cdc7bce4d73106feeafaccf0fda2d65acd975c106dea55602b06973b2d850741c",
    "signer": "0xE08B006459446E8563f9D7e3af3f424D9dE92E75",
    "userId": "274933861"
  }
}