{
  "manageEntity": {
    "action": "Update",
    "entityId": "621518156",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xa5fac5507bd49d7175759e5dbd5ac115ead8cd82550cdc731808de44fe336700",
    "signature": "0xc502c690aa2b6b88a70712ffc102090164d4be81c7de14212d47c749c2b012c54d7183aa6667d42f55be3cd6b5fb9eec082dd1b64513eefe1884db2dda4e5c5e1c",
    "signer": "0x4152595061734417F9722e17caD8A3f689e00974",
    "userId": "621518156"
  }
}