{
  "manageEntity": {
    "action": "Update",
    "entityId": "664129502",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieravbs6ytcrwdlkw43sb4l3k37him723wcbmoryetddzleiz2npij2a\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1966700766}]}}}",
    "nonce": "0xc408edca4f1c867ee09a817ec04adba31e3e8cb82bf0834f45c5aef0d8343804",
    "signature": "0x3f68f2f76c4253163aba2e250226708c3438e5598a99fc06540a7e7166291d5a551290d4e02b9619cd696b43670f555af6efd3868d9e4377557f657415b1cd431b",
    "signer": "0x97C0F2400420716C8E51fC299bAB6e9Bd2d337cc",
    "userId": "664129502"
  }
}